WO2024087459A1 - 电池能量分配单元温度控制方法 - Google Patents
电池能量分配单元温度控制方法 Download PDFInfo
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- WO2024087459A1 WO2024087459A1 PCT/CN2023/080857 CN2023080857W WO2024087459A1 WO 2024087459 A1 WO2024087459 A1 WO 2024087459A1 CN 2023080857 W CN2023080857 W CN 2023080857W WO 2024087459 A1 WO2024087459 A1 WO 2024087459A1
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- Prior art keywords
- distribution unit
- energy distribution
- battery energy
- temperature
- cooling system
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 214
- 239000007788 liquid Substances 0.000 claims abstract description 200
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000005070 sampling Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 3
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 3
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 3
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 2
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 1
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
- G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the embodiments of the present application relate to the field of automobile safety management technology, for example, to a temperature control method for a battery energy distribution unit.
- the battery energy distribution unit has the problem of difficulty in heat dissipation.
- electrical components with large current carrying capacity and higher specifications such as fuses and relays, etc.
- such a battery energy distribution unit will be larger in size, larger in space, heavier in weight, and more expensive.
- An embodiment of the present application provides a battery energy distribution unit temperature control method, which can control the temperature of the battery energy distribution unit so that the battery energy distribution unit does not need to select electrical components with large current carrying capacity and higher specifications and models.
- an embodiment of the present application provides a battery energy distribution unit temperature control method, which is applied to a battery management system in a battery pack, wherein the battery energy distribution unit is provided with a battery energy distribution unit liquid cooling system, and the battery energy distribution unit liquid cooling system is connected in series with the battery pack liquid cooling system;
- the battery energy distribution unit temperature control method comprises:
- the target data includes at least one of a first temperature and a distribution current
- a control instruction is generated and sent to the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system, so that the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system starts operating according to the control instruction to control the temperature of the battery energy distribution unit.
- the target data includes the first temperature
- the control instruction includes a first control instruction and a second control instruction
- the step of generating a control instruction according to the target data and sending it to the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system so that the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system starts to operate according to the control instruction includes:
- a second control instruction is generated and sent to the battery pack liquid cooling system, so that the battery pack liquid cooling system starts to operate according to the second control instruction.
- the target data includes the distribution current
- the control instruction includes a first control instruction and a second control instruction
- the step of generating a control instruction according to the target data and sending it to the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system so that the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system starts to operate according to the control instruction includes:
- the second control instruction is generated and sent to the battery pack liquid cooling system, so that the battery pack liquid cooling system starts to operate according to the second control instruction.
- the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system starts to operate according to the control instruction, including one of the following:
- the battery energy distribution unit liquid cooling system controls the water pump to operate according to the first control instruction
- the battery pack liquid cooling system controls the operation of the water pump according to the second control instruction.
- the battery energy distribution unit liquid cooling system controls the water pump to operate according to the first control instruction, it further includes:
- the second control instruction is generated and sent to the battery pack liquid cooling system, so that the battery pack liquid cooling system controls the operation of the water pump according to the second control instruction to control the temperature of the battery energy distribution unit.
- the first control instruction is generated and sent to the battery energy distribution unit liquid cooling system, so that the battery energy distribution unit liquid cooling system controls the operation of the water pump according to the first control instruction to control the temperature of the battery energy distribution unit.
- the cooling condition includes:
- the second temperature is less than or equal to a second temperature threshold.
- judging whether the battery energy distribution unit liquid cooling system is operating faultily according to the second temperature includes:
- the fault types of the battery energy distribution unit liquid cooling system include insufficient cooling and cooling failure
- Determining the fault type of the liquid cooling system of the battery energy distribution unit according to the second temperature includes:
- the fault type of the liquid cooling system of the battery energy distribution unit is insufficient cooling.
- the fault processing of the battery energy distribution unit according to the fault type includes:
- the vehicle controller reduces the engine power according to the power reduction instruction, or the charging pile reduces the charging power according to the power reduction instruction.
- the fault processing of the battery energy distribution unit according to the fault type includes:
- the battery energy distribution unit of the embodiment of the present application is provided with a battery energy distribution unit liquid cooling system.
- the battery energy distribution unit temperature control method is applied to the battery management system in the battery pack, and the battery management system can detect the target data of the battery energy distribution unit, wherein the target data includes at least one of the first temperature and the distribution current, so that the battery management system can monitor the first temperature and the distribution current of the battery energy distribution unit in real time, so as to facilitate the subsequent adjustment of the temperature of the battery energy distribution unit.
- the battery management system generates a control instruction based on the target data and sends it to the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system, so that the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system starts to operate according to the control instruction, thereby controlling the heat exchange speed between the battery energy distribution unit and the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system, thereby realizing the control of the heat dissipation and cooling of the battery energy distribution unit. It can be seen from this that this scheme can control the temperature of the battery energy distribution unit, so that the battery energy distribution unit does not need to select electrical components with large current carrying capacity and higher specifications and models, thereby not making the volume of the battery energy distribution unit larger, the space larger, the weight heavier, and the cost increased.
- FIG1 is a schematic diagram of the connection relationship between a battery energy distribution unit liquid cooling system and a battery pack liquid cooling system provided in an embodiment of the present application;
- FIG2 is a schematic flow chart of a method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application
- FIG3 is a schematic diagram of a connection structure between a battery management system and a battery energy distribution unit provided in an embodiment of the present application;
- FIG4 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application.
- FIG5 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application.
- FIG6 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application.
- FIG7 is a flow chart of a method for a battery management system to determine whether a battery energy distribution unit meets a temperature reduction condition provided by an embodiment of the present application;
- FIG8 is a flow chart of a method for a battery management system to determine whether a liquid cooling system of a battery energy distribution unit is operating faultily, provided by an embodiment of the present application;
- FIG. 9 is a flow chart of a method for determining a fault type of a liquid cooling system of a battery energy distribution unit according to a second temperature in a battery management system provided by an embodiment of the present application;
- FIG10 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application.
- Figure 1 is a schematic diagram of the connection relationship between a battery energy distribution unit liquid cooling system and a battery pack liquid cooling system provided in an embodiment of the present application; the battery energy distribution unit is provided with a battery energy distribution unit liquid cooling system, and the battery energy distribution unit liquid cooling system is connected in series with the battery pack liquid cooling system.
- the battery pack liquid cooling system is provided with a battery pack cold liquid water inlet 01, a battery pack condenser 02 and a battery pack cold liquid water outlet 03.
- the battery energy distribution unit liquid cooling system is provided with a battery energy distribution unit condenser 04.
- the battery pack cold liquid water inlet 01, the battery pack condenser 02, the battery energy distribution unit condenser 04 and the battery pack cold liquid water outlet 03 are connected in series.
- the battery pack condenser 02 is arranged around the battery pack
- the battery energy distribution unit condenser 04 is arranged around the battery energy distribution unit
- the battery pack cold liquid water inlet 01 and the battery pack cold liquid water outlet 03 are connected to the water pump 05
- the water pump 05 can control the circulation of the cold liquid in the battery pack condenser 02 and the battery energy distribution unit condenser 04, thereby realizing the cold liquid and the battery pack.
- Table 1 is the management information of the operating conditions of the battery energy distribution unit and the heating conditions of the battery cells provided in the embodiment of the present application. According to the operating conditions of the battery energy distribution unit and the heating conditions of the battery cells in Table 1, the temperature control of the battery energy distribution unit is analyzed, wherein the maximum temperature of the battery energy distribution unit is less than 85°C.
- the battery pack thermal management system performs the heating function, the cold liquid is ⁇ 40°C, and the battery energy distribution unit does not work at high power due to the battery cell capacity.
- the battery pack charge and discharge current is low, the battery energy distribution unit has low heating power, and the maximum temperature of the battery energy distribution unit is within 85°C.
- the battery pack thermal management system When the cell temperature is between 10°C and 15°C, the battery pack thermal management system continues to perform the heating function, the cold liquid is ⁇ 40°C, the cell is allowed to work at high power, the distribution current of the battery energy distribution unit increases, and there is a situation where the cold liquid temperature increases and the cold liquid circulation speed is low. Therefore, the battery management system needs to collect the temperature or distribution current of the battery energy distribution unit.
- the battery energy distribution unit liquid cooling system needs to control the high-speed circulation of the cold liquid to accelerate the heat exchange speed between the cold liquid and the battery energy distribution unit, so as to achieve the purpose of cooling the battery energy distribution unit, until the temperature of the battery energy distribution unit drops to 70°C (70 degrees Celsius is the set threshold of the battery management system, and the battery energy distribution unit can work normally under this set threshold), the battery energy distribution unit liquid cooling system stops working, and the battery pack liquid cooling system controls the cold liquid circulation to dissipate heat from the battery energy distribution unit.
- the battery pack thermal management system performs the cooling function.
- the maximum temperature of the battery energy distribution unit collected by the battery management system is greater than or equal to 85°C (85°C is the set threshold of the battery management system) Or the distribution current is ⁇ 400A (400A is the set threshold of the battery management system)
- the battery energy distribution unit liquid cooling system needs to control the high-speed circulation of cold liquid to accelerate the heat exchange rate between the cold liquid and the battery energy distribution unit, so as to achieve the purpose of cooling the battery energy distribution unit, until the temperature of the battery energy distribution unit drops to 70°C (70 degrees Celsius is the set threshold of the battery management system, and the battery energy distribution unit can work normally under this threshold), the battery energy distribution unit liquid cooling system stops working, and the battery pack liquid cooling system controls the cold liquid circulation to dissipate heat from the battery energy distribution unit.
- an embodiment of the present application provides a battery energy distribution unit temperature control method to control the temperature of the battery energy distribution unit, so that the battery energy distribution unit does not need to select electrical components with large current carrying capacity and higher specifications and models.
- FIG2 is a flow chart of a method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application. This embodiment can be applied to controlling the temperature of a battery energy distribution unit having a liquid cooling system for the battery energy distribution unit.
- the method can be executed by a battery management system, which can be implemented in hardware and/or software. The steps of the method include:
- the first temperature refers to the temperature of the battery energy distribution unit
- the distribution current refers to the current of the high-voltage circuit of the battery energy distribution unit.
- FIG3 is a schematic diagram of the connection structure of a battery management system and a battery energy distribution unit provided in an embodiment of the present application.
- the battery management system 10 is connected to the battery energy distribution unit 20.
- the battery energy distribution unit 20 includes a current sensor P and a plurality of temperature sampling points. Among them, the battery management system 10 is connected to the battery energy distribution unit 20.
- the battery management system 10 is connected to a plurality of temperature sampling points (such as temperature sampling point NTC1, temperature sampling point NTC2, temperature sampling point NTC3 and temperature sampling point NTC4) of the high-voltage circuit of the battery energy distribution unit 20, so that the first temperature of the battery energy distribution unit 20 can be detected.
- the temperature sampling point can be set near the active and passive integrated fuse Q, the main positive relay M1, the main negative relay M2, the pre-charge relay M3 and the fast charge relay M4 to improve the accuracy of the battery management system 10 detecting the first temperature of the battery energy distribution unit 20.
- the battery management system 10 is also connected to the current sensor P, which can detect the distribution current of the high-voltage circuit of the battery energy distribution unit 20, monitor the distribution current of the high-voltage circuit in real time, and transmit the distribution current of the high-voltage circuit to the battery management system 10 in real time.
- the battery management system 10 obtains the first temperature and the distribution current, and can monitor the first temperature and the distribution current of the battery energy distribution unit 20 in real time through the magnitude of the first temperature and the magnitude of the distribution current, so as to subsequently adjust and control the temperature of the battery energy distribution unit 20.
- the battery management system 10 can directly judge whether the temperature of the battery energy distribution unit 20 will affect the normal operation of the battery energy distribution unit 20 through the size of the first temperature, and generate control instructions based on whether the temperature of the battery energy distribution unit 20 will affect the normal operation of the battery energy distribution unit 20 as the judgment standard, thereby realizing rapid adjustment of the temperature of the battery energy distribution unit 20.
- the battery management system 10 can indirectly judge whether the temperature of the battery energy distribution unit 20 will affect the normal operation of the battery energy distribution unit 20 through the size of the distribution current, and generate control instructions based on whether the temperature of the battery energy distribution unit 20 will affect the normal operation of the battery energy distribution unit 20 as the judgment standard, thereby realizing rapid adjustment of the temperature of the battery energy distribution unit 20.
- the battery energy distribution unit liquid cooling system starts running according to the control instructions, which can control the high-speed circulation of the cold liquid and accelerate the heat exchange speed between the cold liquid and the battery energy distribution unit 20, thereby realizing the control of the rapid cooling of the battery energy distribution unit 20.
- the battery energy distribution unit liquid cooling system stops running, and the battery pack liquid cooling system starts running according to the control instructions, which can control the normal circulation of the cold liquid, thereby realizing the normal heat dissipation control of the battery energy distribution unit 20.
- the battery energy distribution unit of the embodiment of the present application is provided with a battery energy distribution unit liquid cooling system.
- the battery energy distribution unit temperature control method is applied to the battery management system in the battery pack, and the battery management system can detect the target data of the battery energy distribution unit, wherein the target data includes at least one of the first temperature and the distribution current, so that the battery management system can monitor the first temperature and the distribution current of the battery energy distribution unit in real time, so as to facilitate the subsequent adjustment of the temperature of the battery energy distribution unit.
- the battery management system generates a control instruction based on the target data and sends it to the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system, so that the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system starts to operate according to the control instruction, thereby controlling the heat exchange speed between the battery energy distribution unit and the battery energy distribution unit liquid cooling system or the battery pack liquid cooling system, thereby realizing the control of the heat dissipation and cooling of the battery energy distribution unit. It can be seen from this that this scheme can control the temperature of the battery energy distribution unit, so that the battery energy distribution unit does not need to select electrical components with large current carrying capacity and higher specifications and models, thereby not making the volume of the battery energy distribution unit larger, the space larger, the weight heavier, and the cost increased.
- control instruction includes a first control instruction and a second control instruction.
- the control instructions generated by the battery management system 10 include a first control instruction and a second control instruction.
- the battery management system 10 When the temperature of the battery energy distribution unit 20 affects the normal operation of the battery energy distribution unit 20, the battery management system 10 generates a first control instruction to dissipate heat and cool the battery energy distribution unit 20 at a high speed.
- the battery management system 10 When the temperature of the battery energy distribution unit 20 does not affect the normal operation of the battery energy distribution unit 20, the battery management system 10 generates a second control instruction to dissipate heat and cool the battery energy distribution unit 20 at a normal speed.
- FIG4 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application. As shown in FIG4 , the steps of the method include:
- S220 determine whether the first temperature is greater than or equal to the first temperature threshold; in response to the determination result that the first temperature is greater than or equal to the first temperature threshold, execute S230; in response to the determination result that the first temperature is less than the first temperature threshold, execute S240.
- the first temperature threshold is a preset temperature, and the first temperature threshold is the maximum temperature at which the battery energy distribution unit 20 can work normally.
- S240 Generate a second control instruction and send it to the battery pack liquid cooling system, so that the battery pack liquid cooling system starts to operate according to the second control instruction.
- the battery management system 10 can directly generate different control instructions according to the magnitude of the first temperature, so as to quickly adjust the temperature of the battery energy distribution unit 20 .
- FIG5 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application. As shown in FIG5 , the steps of the method include:
- S320 determine whether the distributed current is greater than or equal to the preset current; in response to the judgment result that the distributed current is greater than or equal to the preset current, execute S330; in response to the judgment result that the distributed current is less than the preset current, execute S310.
- the preset current is a pre-set current.
- the temperature of the battery energy distribution unit 20 will rise rapidly and exceed the temperature range in which the battery energy distribution unit 20 can work normally.
- the battery management system 10 needs to calculate the duration from the start of receiving the distributed current to prevent the received distributed current from being inaccurate due to fluctuations in the distributed current.
- S340 determine whether the duration is greater than the preset time; in response to the determination result that the duration is greater than the preset time, execute S350; in response to the determination result that the duration is less than or equal to the preset time, execute S360.
- S360 Generate a second control instruction and send it to the battery pack liquid cooling system, so that the battery pack liquid cooling system starts to operate according to the second control instruction.
- the battery management system 10 can indirectly generate different control instructions by distributing current, thereby quickly adjusting the temperature of the battery energy distribution unit 20.
- FIG6 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application. As shown in FIG6 , the steps of the method include:
- S410 detecting target data of a battery energy distribution unit, wherein the target data includes at least one of a first temperature and a distribution current.
- S420 Generate a first control instruction or a second control instruction according to the target data.
- the second temperature is the temperature of the battery energy distribution unit 20 detected by the battery management system 10 after the liquid cooling system of the battery energy distribution unit controls the water pump to operate according to the first control instruction.
- the second temperature is a temperature at which the battery energy distribution unit 20 can work normally, it means that the battery energy distribution unit 20 cools down successfully and the battery energy distribution unit 20 meets the cooling condition. If the second temperature is a temperature at which the battery energy distribution unit 20 cannot work normally, it means that the battery energy distribution unit 20 cools down unsuccessfully and the battery energy distribution unit 20 does not meet the cooling condition.
- the battery energy distribution unit 20 fails to cool down, it is necessary to determine whether the reason for the failure to cool down the battery energy distribution unit 20 is that the temperature of the battery energy distribution unit 20 has not yet been lowered to a temperature at which it can operate normally, or whether the battery energy distribution unit liquid cooling system fails to operate properly.
- S434 Determine the fault type of the liquid cooling system of the battery energy distribution unit according to the second temperature, and perform fault processing on the battery energy distribution unit according to the fault type.
- the fault types of the battery energy distribution unit liquid cooling system include insufficient cooling and cooling failure.
- the temperature of the battery energy distribution unit 20 is within a temperature range, for example, 130°C>the temperature of the battery energy distribution unit 20 ⁇ 105°C.
- the temperature of the battery energy distribution unit 20 is also within a temperature range, for example, the temperature of the battery energy distribution unit 20 ⁇ 130°C.
- FIG7 is a flow chart of a method for a battery management system to determine whether a battery energy distribution unit meets a cooling condition provided in an embodiment of the present application. Based on the above embodiment, the method for the battery management system to determine whether the battery energy distribution unit meets the cooling condition according to the second temperature includes:
- S510 determine whether the second temperature is less than or equal to the second temperature threshold; if the second temperature is less than or equal to the second temperature threshold, execute S520; if the second temperature is greater than the second temperature threshold, execute S530.
- the second temperature threshold is the maximum temperature at which the battery energy distribution unit can operate normally.
- FIG8 is a flow chart of a method for a battery management system to determine whether a battery energy distribution unit liquid cooling system has failed to operate according to an embodiment of the present application. Based on the above embodiment, the method for the battery management system to determine whether a battery energy distribution unit liquid cooling system has failed to operate according to a second temperature includes:
- S610 determine whether the second temperature is greater than or equal to the third temperature threshold; in response to the determination result that the second temperature is greater than or equal to the third temperature threshold, execute S620; in response to the determination result that the second temperature is less than the third temperature threshold, execute S630.
- the third temperature threshold is the minimum temperature value that cannot be reached by the battery energy distribution unit for effective cooling.
- the battery energy distribution unit liquid cooling system operates normally.
- the failure types of the battery energy distribution unit liquid cooling system include insufficient cooling and cooling failure.
- the temperature of the battery energy distribution unit 20 is within a temperature range, for example, 130°C> the temperature of the battery energy distribution unit 20 ⁇ 105°C.
- the temperature of the battery energy distribution unit 20 is also within a temperature range, for example, the temperature of the battery energy distribution unit 20 ⁇ 130°C.
- FIG9 is a flow chart of a method for a battery management system to determine a fault type of a liquid cooling system of a battery energy distribution unit according to a second temperature provided in an embodiment of the present application.
- the method for the battery management system to determine a fault type of a liquid cooling system of a battery energy distribution unit according to a second temperature includes:
- S710 determine whether the second temperature is less than a fourth temperature threshold; in response to the determination result that the second temperature is less than the fourth temperature threshold, execute S720; in response to the determination result that the second temperature is greater than or equal to the fourth temperature threshold, execute S730.
- the fourth temperature threshold is the minimum temperature value reached by the battery energy distribution unit 20 when the battery energy distribution unit liquid cooling system is unable to adjust the temperature of the battery energy distribution unit 20 .
- S720 The fault type of the battery energy distribution unit liquid cooling system is insufficient cooling.
- S730 The fault type of the battery energy distribution unit liquid cooling system is cooling failure.
- FIG10 is a flow chart of another method for controlling the temperature of a battery energy distribution unit provided in an embodiment of the present application. As shown in FIG10 , the steps of the method include:
- Detect target data of a battery energy distribution unit wherein the target data includes at least one of a first temperature and a distribution current; continue to execute S812 and S813, or continue to execute S812 or S813.
- S812 determine whether the first temperature is greater than or equal to the first temperature threshold; in response to the determination result that the first temperature is greater than or equal to the first temperature threshold, execute S816; in response to the determination result that the first temperature is less than the first temperature threshold, execute S819.
- S813 determine whether the distributed current is greater than or equal to the preset current; in response to the judgment result that the distributed current is greater than or equal to the preset current, execute S814; in response to the judgment result that the distributed current is less than the preset current, execute S811.
- S814 Calculate the duration from the start of receiving the distributed current.
- the duration of receiving the distributed current from the beginning is calculated, and whether the duration is greater than the preset time can be calculated from the time when the distributed current greater than or equal to the preset current is received, and the duration of receiving the current greater than or equal to the preset current is calculated. For example, if the preset current is 400A, the duration of receiving the current greater than or equal to 400A is calculated. The distribution current starts from the time when the distribution current is greater than or equal to 400A, and then it is determined whether the duration is greater than the preset time.
- S816 Generate a first control instruction and send it to the battery energy distribution unit liquid cooling system, so that the battery energy distribution unit liquid cooling system starts to operate according to the first control instruction.
- S819 Generate a second control instruction and send it to the battery pack liquid cooling system, so that the battery pack liquid cooling system starts to operate according to the second control instruction.
- S820 determine whether the second temperature is greater than or equal to the third temperature threshold; in response to the determination result that the second temperature is greater than or equal to the third temperature threshold, execute S821; in response to the determination result that the second temperature is less than the third temperature threshold, execute S816.
- S821 determine whether the second temperature is less than a fourth temperature threshold; in response to the determination result that the second temperature is less than the fourth temperature threshold, execute S822; in response to the determination result that the second temperature is greater than or equal to the fourth temperature threshold, execute S824.
- the third temperature threshold is 105°C and the fourth temperature threshold is 130°C.
- the battery management system 10 detects that 130°C> the temperature of the battery energy distribution unit 20 is ⁇ 105°C, the battery management system 10 sends a power reduction instruction to the vehicle controller or the charging pile to reduce the power to 80% of the current power.
- the current power is reduced by 20% for every 1°C increase in the temperature of the battery energy distribution unit 20.
- the vehicle controller reduces the engine power according to the power reduction instruction or the charging pile reduces the charging power according to the power reduction instruction; execute S825.
- the battery management system 10 is connected to the battery energy distribution unit 20.
- the battery energy distribution unit 20 also includes an active and passive integrated fuse Q, a discharge terminal A, a charging terminal C, a main positive relay M1, a main negative relay M2, a pre-charge relay M3, and a fast charge relay M4.
- the battery management system 10 is connected to the battery energy distribution unit 20.
- the battery management system 10 is respectively connected to the active and passive integrated fuse Q, the main positive relay M1, the main negative relay M2, the pre-charge relay M3 and the fast charge relay M4.
- the battery management system 10 controls the battery energy distribution unit 20 to cut off the power.
- the battery management system 10 can provide an excitation power signal to the active and passive integrated fuse Q, so that the built-in gunpowder of the active and passive integrated fuse Q is triggered, thereby actively blowing up the high-voltage circuit of the battery energy distribution unit 20, thereby
- the battery management system 10 can send control signals to the main positive relay M1, the main negative relay M2, the pre-charge relay M3 and the fast-charge relay M4 respectively, thereby controlling the main positive relay M1, the main negative relay M2, the pre-charge relay M3 and the fast-charge relay M4 to disconnect.
- the battery management system and the vehicle controller record the fault information of the battery energy distribution unit liquid cooling system.
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Abstract
一种电池能量分配单元(20)温度控制方法。控制方法包括：电池管理系统(10)检测电池能量分配单元(20)的目标数据，其中，目标数据包括第一温度和分配电流中的至少一种(S110)；根据目标数据，产生控制指令发送给电池能量分配单元(20)液冷系统或电池包液冷系统，以使电池能量分配单元(20)液冷系统或电池包液冷系统根据控制指令开始运行，以控制电池能量分配单元(20)的温度(S120)。方案可以控制电池能量分配单元(20)的温度，使得电池能量分配单元(20)无需选择载流能力大且更高规格型号的电气部件。
Description
本申请要求在2022年10月24日提交中国专利局、申请号为202211299662.4的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
本申请实施例涉及汽车安全管理技术领域，例如涉及一种电池能量分配单元温度控制方法。
电池能量分配单元具有难以散热的问题。对此，为了控制电池能量分配单元的温度，一般选择配置载流能力大且规格型号更高的电气部件(例如熔断器和继电器等)，以使电池能量分配单元的耐热程度提高。但这种电池能量分配单元的体积会更大，空间更大，重量也会更重，成本也会更高。
发明内容
本申请实施例提供了一种电池能量分配单元温度控制方法，可以控制电池能量分配单元的温度，使得电池能量分配单元无需选择载流能力大且规格型号更高的电气部件。
第一方面，本申请实施例提供了一种电池能量分配单元温度控制方法，应用于电池包内的电池管理系统，其中，电池能量分配单元设置有电池能量分配单元液冷系统，所述电池能量分配单元液冷系统与电池包液冷系统串联；
所述电池能量分配单元温度控制方法，包括：
检测所述电池能量分配单元的目标数据，其中，所述目标数据包括第一温度和分配电流中的至少一种；
根据所述目标数据，产生控制指令发送给所述电池能量分配单元液冷系统或所述电池包液冷系统，以使所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，以控制所述电池能量分配单元的温度。
在一实施例中，所述目标数据包括所述第一温度，所述控制指令包括第一控制指令和第二控制指令；
所述根据所述目标数据，产生控制指令发送给所述电池能量分配单元液冷系统或所述电池包液冷系统，以使所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，包括：
判断所述第一温度是否大于或等于第一温度阈值；
响应于所述第一温度大于或等于第一温度阈值的判断结果，产生所述第一控制指令并发送给所述电池能量分配单元液冷系统，以使所述电池能量分配单元液冷系统根据所述第一控制指令开始运行；
响应于所述第一温度小于第一温度阈值的判断结果，产生所述第二控制指令并发送给所述电池包液冷系统，以使所述电池包液冷系统根据所述第二控制指令开始运行。
在一实施例中，所述目标数据包括所述分配电流，所述控制指令包括第一控制指令和第二控制指令；
所述根据所述目标数据，产生控制指令发送给所述电池能量分配单元液冷系统或所述电池包液冷系统，以使所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，包括：
判断所述分配电流是否大于或等于预设电流；
响应于所述分配电流大于或等于预设电流的判断结果，计算自开始接收所述分配电流的持续时间；
判断所述持续时间是否大于预设时间；
响应于所述持续时间大于预设时间的判断结果，产生所述第一控制指令并发送给所述电池能量分配单元液冷系统，以使所述电池能量分配单元液冷系统根据所述第一控制指令开始运行；
响应于所述持续时间小于或等于预设时间的判断结果，产生所述第二控制指令并发送给所述电池包液冷系统，以使所述电池包液冷系统根据所述第二控制指令开始运行。
在一实施例中，所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，包括以下之一：
在产生所述第一控制指令的情况下，所述电池能量分配单元液冷系统根据所述第一控制指令控制水泵运行；
在产生所述第二控制指令的情况下，所述电池包液冷系统根据所述第二控制指令控制水泵运行。
在一实施例中，在所述电池能量分配单元液冷系统根据所述第一控制指令控制水泵运行之后，还包括：
获取所述电池能量分配单元的第二温度；
根据所述第二温度，判断所述电池能量分配单元是否满足降温条件；
响应于所述电池能量分配单元满足降温条件的判断结果，产生所述第二控制指令发送给所述电池包液冷系统，以使所述电池包液冷系统根据所述第二控制指令控制水泵运行，以控制所述电池能量分配单元的温度。
响应于所述电池能量分配单元不满足降温条件的判断结果，根据所述第二温度判断所述电池能量分配单元液冷系统是否故障运行；
响应于所述电池能量分配单元液冷系统为故障运行的判断结果，根据所述第二温度确定所述电池能量分配单元液冷系统的故障类型，并根据所述故障类型对所述电池能量分配单元进行故障处理；
响应于所述电池能量分配单元液冷系统为非故障运行的判断结果，产生所述第一控制指令发送给所述电池能量分配单元液冷系统，以使所述电池能量分配单元液冷系统根据所述第一控制指令控制水泵运行，以控制所述电池能量分配单元的温度。
在一实施例中，所述降温条件包括：
所述第二温度小于或等于第二温度阈值。
在一实施例中，根据所述第二温度判断所述电池能量分配单元液冷系统是否故障运行，包括：
判断所述第二温度是否大于或等于第三温度阈值；
响应于所述第二温度大于或等于第三温度阈值的判断结果，确定所述电池能量分配单元液冷系统故障运行；
响应于所述第二温度小于第三温度阈值的判断结果，确定所述电池能量分配单元液冷系统正常运行。
在一实施例中，所述电池能量分配单元液冷系统的故障类型包括冷却不足和冷却失效；
根据所述第二温度确定所述电池能量分配单元液冷系统的故障类型，包括：
判断所述第二温度是否小于第四温度阈值；
响应于所述第二温度小于第四温度阈值的判断结果，确定所述电池能量分配单元液冷系统的故障类型为冷却不足；
响应于所述第二温度大于或等于第四温度阈值的判断结果，确定所述电池能量分配单元液冷系统的故障类型为冷却失效。
在一实施例中，在所述电池能量分配单元液冷系统的故障类型为冷却不足
的情况下，所述根据所述故障类型对所述电池能量分配单元进行故障处理，包括：
向整车控制器或充电桩发送降功率指令；
通过所述整车控制器根据所述降功率指令降低发动机的功率或通过所述充电桩根据所述降功率指令降低充电功率。
在一实施例中，在所述电池能量分配单元液冷系统的故障类型为冷却失效的情况下，所述根据所述故障类型对所述电池能量分配单元进行故障处理，包括：
控制所述电池能量分配单元断电。
本申请的有益效果：
本申请实施例的电池能量分配单元设置有电池能量分配单元液冷系统。电池能量分配单元温度控制方法应用于电池包内的电池管理系统，电池管理系统可以检测电池能量分配单元的目标数据，其中，目标数据包括第一温度和分配电流中的至少一种，由此电池管理系统可以通过实时监控电池能量分配单元的第一温度和分配电流，便于后续对电池能量分配单元的温度进行调节。电池管理系统根据目标数据，产生控制指令发送给电池能量分配单元液冷系统或电池包液冷系统，以使电池能量分配单元液冷系统或电池包液冷系统根据控制指令开始运行，从而控制电池能量分配单元与电池能量分配单元液冷系统或电池包液冷系统的热量交换速度，进而实现对电池能量分配单元散热降温的控制。由此可知，本方案可以控制电池能量分配单元的温度，使得电池能量分配单元无需选择载流能力大且规格型号更高的电气部件，从而不会使电池能量分配单元的体积变大、空间变大、重量变重以及成本增加。
图1为本申请实施例提供的一种电池能量分配单元液冷系统与电池包液冷系统的连接关系示意图；
图2为本申请实施例提供的一种电池能量分配单元温度控制方法的流程示意图；
图3为本申请实施例提供的一种电池管理系统和电池能量分配单元的连接结构示意图；
图4为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图；
图5为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图；
图6为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图；
图7为本申请实施例提供的一种电池管理系统判断电池能量分配单元是否满足降温条件的方法的流程示意图；
图8为本申请实施例提供的一种电池管理系统判断电池能量分配单元的液冷系统是否发生故障运行的方法的流程示意图；
图9为本申请实施例提供的一种电池管理系统根据第二温度确定电池能量分配单元的液冷系统的故障类型的方法的流程示意图；
图10为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备，不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
图1为本申请实施例提供的一种电池能量分配单元液冷系统与电池包液冷系统的连接关系示意图；电池能量分配单元设置有电池能量分配单元液冷系统，电池能量分配单元液冷系统与电池包液冷系统串联。
电池包液冷系统设置有电池包冷液进水口01、电池包冷凝管02以及电池包冷液出水口03。电池能量分配单元液冷系统设置有电池能量分配单元冷凝管04。电池包冷液进水口01、电池包冷凝管02、电池能量分配单元冷凝管04以及电池包冷液出水口03串联连接。其中，电池包冷凝管02设置于电池包的周围，电池能量分配单元冷凝管04设置于电池能量分配单元的周围，电池包冷液进水口01和电池包冷液出水口03与水泵05连接，水泵05可以控制冷液在电池包冷凝管02和电池能量分配单元冷凝管04中循环流动，从而实现冷液与电池包
和电池能量分配单元的热能交换。
表1为本申请实施例提供的电池能量分配单元的使用工况和电芯发热工况的管理信息，根据表1中电池能量分配单元的使用工况和电芯发热工况，对电池能量分配单元温度控制进行分析，其中电池能量分配单元的最高温度小于85℃。
分析上表可知，电芯温度在-20℃～10℃时，电池包热管理系统执行加热功能，冷液≤40℃，受电芯能力影响电池能量分配单元不存在大功率工作的情况，电池包充放电电流较低，电池能量分配单元发热功率低，电池能量分配单元最高温度在85℃以内，电池能量分配单元温度与冷液温度存在温差，电池能量分配单元的热量可传递到冷液内，电池能量分配单元液冷系统可以不进行工作，仅电池包液冷系统控制冷液循环对电池能量分配单元进行散热即可。
电芯温度在10℃～15℃时，电池包热管理系统继续执行加热功能，冷液≤40℃，电芯允许大功率工作，电池能量分配单元的分配电流增大，存在冷液温度增高且冷液循环速度低的情况。因此，需要电池管理系统采集电池能量分配单元的温度或分配电流。当电池管理系统采集的电池能量分配单元的最高温度≥85℃(85℃为电池管理系统的设定阀值)或分配电流≥400A(400A为电池管理系统的设定阀值)，电池能量分配单元液冷系统需要控制冷液高速循环，以加速冷液与电池能量分配单元的热量交换速度，从而达到对电池能量分配单元降温的目的，直至电池能量分配单元的温度降低至70℃(70摄氏度为电池管理系统的设定阀值，在此设定阈值下电池能量分配单元可以正常工作)，电池能量分配单元液冷系统停止工作，电池包液冷系统控制冷液循环对电池能量分配单元进行散热。
电芯温度＞30℃时，电池包热管理系统执行制冷功能。当电池管理系统采集的电池能量分配单元的最高温度≥85℃(85℃为电池管理系统的设定阀值)
或分配电流≥400A(400A为电池管理系统的设定阀值)，电池能量分配单元液冷系统需要控制冷液高速循环，以加速冷液与电池能量分配单元的热量交换速度，从而达到对电池能量分配单元降温的目的，直至电池能量分配单元的温度降低至70℃(70摄氏度为电池管理系统的设定阀值，在此阈值下电池能量分配单元可以正常工作)，电池能量分配单元液冷系统停止工作，电池包液冷系统控制冷液循环对电池能量分配单元进行散热。
根据上述分析，本申请实施例提供了一种电池能量分配单元温度控制方法，以控制电池能量分配单元的温度，使得电池能量分配单元无需选择载流能力大且规格型号更高的电气部件。
图2为本申请实施例提供的一种电池能量分配单元温度控制方法的流程示意图，本实施例可适用于对具有电池能量分配单元液冷系统的电池能量分配单元进行温度控制，该方法可以由电池管理系统执行，电池管理系统可采用硬件和/或软件的方式来实现。该方法的步骤包括：
S110、检测电池能量分配单元的目标数据，其中，目标数据包括第一温度和分配电流中的至少一种。
第一温度是指电池能量分配单元的温度，分配电流是指电池能量分配单元的高压电路的电流。示例性地，图3为本申请实施例提供的一种电池管理系统和电池能量分配单元的连接结构示意图，如图3所示，电池管理系统10和电池能量分配单元20连接。电池能量分配单元20包括电流传感器P和多个温度采样点。其中，电池管理系统10与电池能量分配单元20连接。电池管理系统10与电池能量分配单元20的高压电路的多个温度采样点(例如温度采样点NTC1、温度采样点NTC2、温度采样点NTC3以及温度采样点NTC4)连接，从而可以检测电池能量分配单元20的第一温度。其中，温度采样点可以设置于主被动一体式熔断器Q、主正继电器M1、主负继电器M2、预充继电器M3以及快充继电器M4附近，以提高电池管理系统10检测电池能量分配单元20的第一温度的精确度。电池管理系统10还与电流传感器P连接，电流传感器P可以检测电池能量分配单元20的高压回路的分配电流，可以实时监测高压回路的分配电流，并实时将高压回路的分配电流传输给电池管理系统10。
电池管理系统10获得第一温度和分配电流，可以通过第一温度的大小和分配电流的大小，实时监控电池能量分配单元20的第一温度和分配电流，以便后续对电池能量分配单元20的温度进行调节控制。
S120、根据目标数据，产生控制指令发送给电池能量分配单元液冷系统或电池包液冷系统，以使电池能量分配单元液冷系统或电池包液冷系统根据控制指令开始运行，以控制电池能量分配单元的温度。
电池管理系统10可以直接通过第一温度的大小，判断电池能量分配单元20的温度是否会影响电池能量分配单元20的正常工作，并以电池能量分配单元20的温度是否会影响电池能量分配单元20的正常工作为判断标准产生控制指令，进而实现对电池能量分配单元20的温度进行快速调节。
另外，电池能量分配单元20的分配电流越大，电池能量分配单元20的温度越高。当分配电流达到一定程度时，会使电池能量分配单元20的温度快速升高且超出电池能量分配单元20正常工作的温度范围。由此，电池管理系统10可以间接通过分配电流的大小，判断电池能量分配单元20的温度是否会影响电池能量分配单元20的正常工作，并以电池能量分配单元20的温度是否会影响电池能量分配单元20的正常工作为判断标准产生控制指令，进而实现对电池能量分配单元20的温度进行快速调节。
当电池能量分配单元20的温度影响电池能量分配单元20的正常工作时，说明电池能量分配单元20的温度过高需要进行快速降温，电池能量分配单元液冷系统根据控制指令启动运行，可以控制冷液高速循环，加速冷液与电池能量分配单元20的热量交换速度，从而实现对电池能量分配单元20快速降温的控制。
当电池能量分配单元20的温度不会影响电池能量分配单元20的正常工作时，电池能量分配单元液冷系统停止运行，由电池包液冷系统根据控制指令控制启动运行，可以控制冷液正常循环，从而实现对电池能量分配单元20正常散热的控制。
本申请实施例的电池能量分配单元设置有电池能量分配单元液冷系统。电池能量分配单元温度控制方法应用于电池包内的电池管理系统，电池管理系统可以检测电池能量分配单元的目标数据，其中，目标数据包括第一温度和分配电流中的至少一种，由此电池管理系统可以通过实时监控电池能量分配单元的第一温度和分配电流，便于后续对电池能量分配单元的温度进行调节。电池管理系统根据目标数据，产生控制指令发送给电池能量分配单元液冷系统或电池包液冷系统，以使电池能量分配单元液冷系统或电池包液冷系统根据控制指令开始运行，从而控制电池能量分配单元与电池能量分配单元液冷系统或电池包液冷系统的热量交换速度，进而实现对电池能量分配单元散热降温的控制。由此可知，本方案可以控制电池能量分配单元的温度，使得电池能量分配单元无需选择载流能力大且规格型号更高的电气部件，从而不会使电池能量分配单元的体积变大、空间变大、重量变重以及成本增加。
可选的，控制指令包括第一控制指令和第二控制指令。
电池管理系统10产生的控制指令包括第一控制指令和第二控制指令。其中，
当电池能量分配单元20的温度会影响电池能量分配单元20的正常工作时，电池管理系统10产生第一控制指令，以高速对电池能量分配单元20进行散热降温。当电池能量分配单元20的温度不会影响电池能量分配单元20的正常工作时，电池管理系统10产生第二控制指令，以正常速度对电池能量分配单元20进行散热降温。
图4为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图，如图4所示，该方法的步骤包括：
S210、检测电池能量分配单元的第一温度。
S220、判断第一温度是否大于或等于第一温度阈值；响应于第一温度大于或等于第一温度阈值的判断结果，执行S230；响应于第一温度小于第一温度阈值的判断结果，执行S240。
其中，第一温度阈值为预先设置的温度，第一温度阈值为电池能量分配单元20可以正常工作时的最高温度。
S230、产生第一控制指令并发送给电池能量分配单元液冷系统，以使电池能量分配单元液冷系统根据第一控制指令开始运行。
S240、产生第二控制指令并发送给电池包液冷系统，以使电池包液冷系统根据第二控制指令开始运行。
上述过程中，电池管理系统10可以直接通过第一温度的大小，产生不同的控制指令，从而快速调节电池能量分配单元20的温度。
图5为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图，如图5所示，该方法的步骤包括：
S310、检测电池能量分配单元的分配电流。
S320、判断分配电流是否大于或等于预设电流；响应于分配电流大于或等于预设电流的判断结果，执行S330；响应于分配电流小于预设电流的判断结果，执行S310。
其中，预设电流为预先设置的电流，电池能量分配单元20的分配电流超过预设电流时，会使电池能量分配单元20的温度快速升高，且超出电池能量分配单元20可以正常工作的温度范围。
S330、计算自开始接收分配电流的持续时间。
由于分配电流存在不稳定的情况，因此电池管理系统10需要计算自开始接收到分配电流的持续时间，以防止因分配电流的波动使接收到的分配电流不准确。
S340、判断持续时间是否大于预设时间；响应于持续时间大于预设时间的判断结果，执行S350；响应于持续时间小于或等于预设时间的判断结果，执行S360。
S350、产生第一控制指令并发送给电池能量分配单元液冷系统，以使电池能量分配单元液冷系统根据第一控制指令开始运行。
S360、产生第二控制指令并发送给电池包液冷系统，以使电池包液冷系统根据第二控制指令开始运行。
上述过程中，电池管理系统10可以间接通过分配电流，产生不同的控制指令，从而快速调节电池能量分配单元20的温度。
图6为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图，如图6所示，该方法的步骤包括：
S410、检测电池能量分配单元的目标数据，其中，目标数据包括第一温度和分配电流中的至少一种。
S420、根据目标数据，产生第一控制指令或第二控制指令。
S430、产生第一控制指令发送给电池能量分配单元液冷系统，以使电池能量分配单元液冷系统根据第一控制指令控制水泵运行，以控制电池能量分配单元的温度。
S431、获取电池能量分配单元的第二温度。
第二温度是池能量分配单元液冷系统根据第一控制指令控制水泵运行后，电池管理系统10所检测的电池能量分配单元20的温度。
S432、根据第二温度，判断电池能量分配单元是否满足降温条件；响应于电池能量分配单元满足降温条件的判断结果，执行S440；响应于电池能量分配单元不满足降温条件的判断结果，执行S433。
若第二温度为电池能量分配单元20可以正常工作的温度，则说明电池能量分配单元20降温成功，电池能量分配单元20满足降温条件。若第二温度为电池能量分配单元20无法正常工作的温度，则说明电池能量分配单元20降温失败，电池能量分配单元20不满足降温条件。
S440、产生第二控制指令发送给电池包液冷系统，以使电池包液冷系统根据第二控制指令控制水泵运行，以控制电池能量分配单元的温度。
S433、根据第二温度判断电池能量分配单元液冷系统是否故障运行；响应于电池能量分配单元液冷系统为故障运行的判断结果，执行S434；响应于电池能量分配单元液冷系统为非故障运行的判断结果，执行S430。
在电池能量分配单元20降温失败的情况下，需要确定电池能量分配单元20降温失败的原因是电池能量分配单元20温度还未降低到可以正常工作的温度导致的，还是电池能量分配单元液冷系统故障运行导致的。
S434、根据第二温度确定电池能量分配单元液冷系统的故障类型，并根据故障类型对电池能量分配单元进行故障处理。
在确定电池能量分配单元20降温失败的原因是电池能量分配单元液冷系统故障运行导致的，需要确定电池能量分配单元液冷系统的故障类型，以便后续电池管理系统10根据电池能量分配单元液冷系统的故障类型进行针对性的故障处理。
示例性的，电池能量分配单元液冷系统的故障类型包括冷却不足和冷却失效。当电池能量分配单元液冷系统冷却不足时，电池能量分配单元20的温度处于一温度范围内，例如130℃＞电池能量分配单元20的温度≥105℃。当电池能量分配单元液冷系统冷却失效时，电池能量分配单元20的温度也处于一温度范围内，例如电池能量分配单元20的温度≥130℃。
示例性地，图7为本申请实施例提供的一种电池管理系统判断电池能量分配单元是否满足降温条件的方法的流程示意图，在上述实施例的基础上，电池管理系统根据第二温度判断电池能量分配单元是否满足降温条件的方法，包括：
S510、判断第二温度是否小于或等于第二温度阈值；若第二温度小于或等于第二温度阈值，则执行S520；若第二温度大于第二温度阈值，则执行S530。
第二温度阈值为电池能量分配单元能够正常工作的最高温度。
S520、电池能量分配单元满足降温条件。
S530、电池能量分配单元不满足降温条件。
示例性地，图8为本申请实施例提供的一种电池管理系统判断电池能量分配单元液冷系统是否发生故障运行的方法的流程示意图，在上述实施例的基础上，电池管理系统根据第二温度判断电池能量分配单元液冷系统是否发生故障运行的方法，包括：
S610、判断第二温度是否大于或等于第三温度阈值；响应于第二温度大于或等于第三温度阈值的判断结果，执行S620；响应于第二温度小于第三温度阈值的判断结果，执行S630。
第三温度阈值为电池能量分配单元有效降温无法达到的最小温度值。
S620、电池能量分配单元液冷系统故障运行。
S630、电池能量分配单元液冷系统正常运行。
可选地，电池能量分配单元液冷系统的故障类型包括冷却不足和冷却失效。
当电池能量分配单元液冷系统冷却不足时，电池能量分配单元20的温度处于一温度范围内，例如130℃＞电池能量分配单元20的温度≥105℃。当电池能量分配单元液冷系统冷却失效时，电池能量分配单元20的温度也处于一温度范围内，例如电池能量分配单元20的温度≥130℃。
示例性地，图9为本申请实施例提供的一种电池管理系统根据第二温度确定电池能量分配单元液冷系统的故障类型的方法的流程示意图，在上述实施例的基础上，电池管理系统根据第二温度确定电池能量分配单元液冷系统的故障类型的方法，包括：
S710、判断第二温度是否小于第四温度阈值；响应于第二温度小于第四温度阈值的判断结果，执行S720；响应于第二温度大于或等于第四温度阈值的判断结果，执行S730。
第四温度阈值为电池能量分配单元液冷系统无法调节电池能量分配单元20的温度时，电池能量分配单元20所达到的最小温度值。
S720、电池能量分配单元液冷系统的故障类型为冷却不足。
S730、电池能量分配单元液冷系统的故障类型为冷却失效。
图10为本申请实施例提供的另一种电池能量分配单元温度控制方法的流程示意图，如图10所示，该方法的步骤包括：
S811、检测电池能量分配单元的目标数据，其中，目标数据包括第一温度和分配电流中的至少一种；继续执行S812和S813，或者继续执行S812或S813。
S812、判断第一温度是否大于或等于第一温度阈值；响应于第一温度大于或等于第一温度阈值的判断结果，执行S816；响应于第一温度小于第一温度阈值的判断结果，执行S819。
S813、判断分配电流是否大于或等于预设电流；响应于分配电流大于或等于预设电流的判断结果，执行S814；响应于分配电流小于预设电流的判断结果，执行S811。
S814、计算自开始接收分配电流的持续时间。
S815、判断持续时间是否大于预设时间；响应于持续时间大于预设时间的判断结果执行S816；响应于持续时间小于或等于预设时间的判断结果，执行S819。
示例性的，计算自开始接收分配电流的持续时间，判断持续时间是否大于预设时间，可以是计算从接收大于或等于预设电流的分配电流起，接收大于或等于预设电流的持续时间，例如预设电流为400A，计算从接收大于或等于400A
的分配电流时起，分配电流大于或等于400A的持续时间，然后判断持续时间是否大于预设时间。
S816、产生第一控制指令并发送给电池能量分配单元液冷系统，以使电池能量分配单元液冷系统根据第一控制指令开始运行。
S817、获取电池能量分配单元的第二温度。
S818、根据第二温度，判断电池能量分配单元是否满足降温条件；响应于电池能量分配单元满足降温条件的判断结果，执行S819；响应于电池能量分配单元不满足降温条件的判断结果，执行S820。
S819、产生第二控制指令并发送给电池包液冷系统，以使电池包液冷系统根据第二控制指令开始运行。
S820、判断第二温度是否大于或等于第三温度阈值；响应于第二温度大于或等于第三温度阈值的判断结果，执行S821；响应于第二温度小于第三温度阈值的判断结果，执行S816。
S821、判断第二温度是否小于第四温度阈值；响应于第二温度小于第四温度阈值的判断结果，执行S822；响应于第二温度大于或等于第四温度阈值的判断结果，执行S824。
S822、向整车控制器或充电桩发送降功率指令。
示例性的，假设第三温度阈值为105℃，第四温度阈值为130℃。当电池管理系统10监测到130℃＞电池能量分配单元20的温度≥105℃时，电池管理系统10向整车控制器或充电桩发送降功率指令，降低功率为当前功率的80％，以105℃为基准，电池能量分配单元20的温度每上升1℃，当前功率降低20％。
S823、整车控制器根据降功率指令降低发动机的功率或充电桩根据降功率指令降低充电功率；执行S825。
S824、控制电池能量分配单元断电。
示例性地，继续参考图3，电池管理系统10和电池能量分配单元20连接。电池能量分配单元20还包括主被动一体式熔断器Q、放电端A、充电端C、主正继电器M1、主负继电器M2、预充继电器M3以及快充继电器M4。
电池管理系统10与电池能量分配单元20连接。电池管理系统10分别与主被动一体式熔断器Q、主正继电器M1、主负继电器M2、预充继电器M3以及快充继电器M4连接。电池管理系统10控制电池能量分配单元20断电，电池管理系统10可以给主被动一体式熔断器Q提供激发电源信号，使主被动一体式熔断器Q的内置火药被触发，从而主动炸开电池能量分配单元20的高压电路，从
而使电池能量分配单元20的高压电路断开。另外，在电池管理系统10控制主被动一体式熔断器Q断开电池能量分配单元20的高压电路之后，电池管理系统10可以分别给主正继电器M1、主负继电器M2、预充继电器M3以及快充继电器M4发送控制信号，从而控制主正继电器M1、主负继电器M2、预充继电器M3以及快充继电器M4断开。
S825、电池管理系统和整车控制器记录电池能量分配单元液冷系统的故障信息。
应该理解，可以使用上面所示的多种形式的流程，重新排序、增加或删除步骤。例如，本申请中记载的多个步骤可以并行地执行也可以顺序地执行也可以不同的次序执行，只要能够实现本申请的技术方案所期望的结果，本文在此不进行限制。
Claims (10)
- 一种电池能量分配单元温度控制方法，应用于电池包内的电池管理系统，其中，电池能量分配单元设置有电池能量分配单元液冷系统，所述电池能量分配单元液冷系统与电池包液冷系统串联；所述电池能量分配单元温度控制方法，包括：检测所述电池能量分配单元的目标数据，其中，所述目标数据包括第一温度和分配电流中的至少一种；根据所述目标数据，产生控制指令发送给所述电池能量分配单元液冷系统或所述电池包液冷系统，以使所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，以控制所述电池能量分配单元的温度。
- 根据权利要求1所述的电池能量分配单元温度控制方法，其中，所述目标数据包括所述第一温度，所述控制指令包括第一控制指令和第二控制指令；所述根据所述目标数据，产生控制指令发送给所述电池能量分配单元液冷系统或所述电池包液冷系统，以使所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，包括：判断所述第一温度是否大于或等于第一温度阈值；响应于所述第一温度大于或等于第一温度阈值的判断结果，产生所述第一控制指令并发送给所述电池能量分配单元液冷系统，以使所述电池能量分配单元液冷系统根据所述第一控制指令开始运行；响应于所述第一温度小于第一温度阈值的判断结果，产生所述第二控制指令并发送给所述电池包液冷系统，以使所述电池包液冷系统根据所述第二控制指令开始运行。
- 根据权利要求1所述的电池能量分配单元温度控制方法，其中，所述目标数据包括所述分配电流，所述控制指令包括第一控制指令和第二控制指令；所述根据所述目标数据，产生控制指令发送给所述电池能量分配单元液冷系统或所述电池包液冷系统，以使所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，包括：判断所述分配电流是否大于或等于预设电流；响应于所述分配电流大于或等于预设电流的判断结果，计算自开始接收所述分配电流的持续时间；判断所述持续时间是否大于预设时间；响应于所述持续时间大于预设时间的判断结果，产生所述第一控制指令并 发送给所述电池能量分配单元液冷系统，以使所述电池能量分配单元液冷系统根据所述第一控制指令开始运行；响应于所述持续时间小于或等于预设时间的判断结果，产生所述第二控制指令并发送给所述电池包液冷系统，以使所述电池包液冷系统根据所述第二控制指令开始运行。
- 根据权利要求2或3所述的电池能量分配单元温度控制方法，其中，所述电池能量分配单元液冷系统或所述电池包液冷系统根据所述控制指令开始运行，包括以下之一：在产生所述第一控制指令的情况下，所述电池能量分配单元液冷系统根据所述第一控制指令控制水泵运行；在产生所述第二控制指令的情况下，所述电池包液冷系统根据所述第二控制指令控制水泵运行。
- 根据权利要求4所述的电池能量分配单元温度控制方法，在所述电池能量分配单元液冷系统根据所述第一控制指令控制水泵运行之后，还包括：获取所述电池能量分配单元的第二温度；根据所述第二温度，判断所述电池能量分配单元是否满足降温条件；响应于所述电池能量分配单元满足降温条件的判断结果，产生所述第二控制指令发送给所述电池包液冷系统，以使所述电池包液冷系统根据所述第二控制指令控制水泵运行，以控制所述电池能量分配单元的温度；响应于所述电池能量分配单元不满足降温条件的判断结果，根据所述第二温度判断所述电池能量分配单元液冷系统是否故障运行；响应于所述电池能量分配单元液冷系统为故障运行的判断结果，根据所述第二温度确定所述电池能量分配单元液冷系统的故障类型，并根据所述故障类型对所述电池能量分配单元进行故障处理；响应于所述电池能量分配单元液冷系统为非故障运行的判断结果，产生所述第一控制指令发送给所述电池能量分配单元液冷系统，以使所述电池能量分配单元液冷系统根据所述第一控制指令控制水泵运行，以控制所述电池能量分配单元的温度。
- 根据权利要求5所述的电池能量分配单元温度控制方法，其中，所述降温条件包括：所述第二温度小于或等于第二温度阈值。
- 根据权利要求5所述的电池能量分配单元温度控制方法，其中，根据所 述第二温度判断所述电池能量分配单元液冷系统是否故障运行，包括：判断所述第二温度是否大于或等于第三温度阈值；响应于所述第二温度大于或等于第三温度阈值的判断结果，确定所述电池能量分配单元液冷系统故障运行；响应于所述第二温度小于第三温度阈值的判断结果，确定所述电池能量分配单元液冷系统正常运行。
- 根据权利要求5所述的电池能量分配单元温度控制方法，其中，所述电池能量分配单元液冷系统的故障类型包括冷却不足和冷却失效；根据所述第二温度确定所述电池能量分配单元液冷系统的故障类型，包括：判断所述第二温度是否小于第四温度阈值；响应于所述第二温度小于第四温度阈值的判断结果，确定所述电池能量分配单元液冷系统的故障类型为冷却不足；响应于所述第二温度大于或等于第四温度阈值的判断结果，确定所述电池能量分配单元液冷系统的故障类型为冷却失效。
- 根据权利要求8所述的电池能量分配单元温度控制方法，其中，在所述电池能量分配单元液冷系统的故障类型为冷却不足的情况下，所述根据所述故障类型对所述电池能量分配单元进行故障处理，包括：向整车控制器或充电桩发送降功率指令；通过所述整车控制器根据所述降功率指令降低发动机的功率或通过所述充电桩根据所述降功率指令降低充电功率。
- 根据权利要求8所述的电池能量分配单元温度控制方法，其中，在所述电池能量分配单元液冷系统的故障类型为冷却失效的情况下，所述根据所述故障类型对所述电池能量分配单元进行故障处理，包括：控制所述电池能量分配单元断电。
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