CN112757882A - Battery pack and management method and system thereof - Google Patents

Battery pack and management method and system thereof Download PDF

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Publication number
CN112757882A
CN112757882A CN201911074584.6A CN201911074584A CN112757882A CN 112757882 A CN112757882 A CN 112757882A CN 201911074584 A CN201911074584 A CN 201911074584A CN 112757882 A CN112757882 A CN 112757882A
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Prior art keywords
battery
module
battery pack
strategy
charge
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CN201911074584.6A
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Chinese (zh)
Inventor
田萌
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Qoros Automotive Co Ltd
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Qoros Automotive Co Ltd
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Priority to CN201911074584.6A priority Critical patent/CN112757882A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The invention discloses a battery pack and a management method and a management system thereof. Wherein the battery package includes: a battery pack housing; the battery pack comprises a main module battery, an auxiliary module battery and a battery management system which are arranged in a battery pack shell, wherein the main module battery and the auxiliary module battery respectively and independently work or jointly work after being connected in series or in parallel. According to the battery pack, the main module battery, the auxiliary module battery and the battery management system are arranged in the same battery pack shell, so that the design of the battery pack is more flexible, the internal space of the battery pack shell is reasonably utilized, and the overall functional requirements of the battery pack are met; in addition, the method and the system select the matched battery charging and discharging strategy according to the current driving scene of the vehicle, form interaction between the battery and the whole vehicle, and automatically adjust the state of the battery pack, thereby improving the charging and discharging capacity of the whole battery pack and the dynamic property and the economical efficiency of the whole vehicle.

Description

Battery pack and management method and system thereof
Technical Field
The invention belongs to the field of battery pack management, and particularly relates to a battery pack and a management method and system thereof.
Background
The battery pack is used as an important part on a pure electric vehicle or a hybrid electric vehicle, and provides power for the running of the vehicle. On the existing vehicle, the battery pack usually adopts a standardized battery module, the standardized battery module is mature in design and has universality, the design difficulty of the battery pack is reduced, but the standardized battery module is difficult to be completely matched with an individualized whole vehicle chassis space and an electric voltage platform, and the single standardized module can restrict the whole management strategy of the battery pack to be exerted, so that the charging and discharging capacity of the battery and the dynamic property and the economical property of the whole vehicle are influenced.
Disclosure of Invention
The invention aims to overcome the defects that the management strategy of the whole battery pack is restricted to be exerted and the charging and discharging capacity of a battery and the dynamic property and the economical efficiency of the whole vehicle are influenced because a single standardized battery module is adopted in the battery pack in the prior art, and provides the battery pack and the management method and system thereof.
The invention solves the technical problems through the following technical scheme:
a battery pack, comprising:
a battery pack housing;
the battery pack comprises a main module battery, an auxiliary module battery and a battery management system which are arranged in a battery pack shell, wherein the main module battery and the auxiliary module battery respectively and independently work or jointly work after being connected in series or in parallel.
Preferably, the type of the main module battery is selected according to the total requirement of the whole vehicle on the battery pack, wherein the total requirement comprises at least one of total electric quantity, total voltage and total output power;
an internal electric core connecting circuit of the main module battery is designed according to the voltage of an electric voltage platform in the vehicle;
the type of the auxiliary module battery is selected according to the pressure difference between the main module battery and the electric voltage platform in the vehicle;
the arrangement position of the secondary module battery is set according to the remaining space between the battery pack case and the primary module battery.
Preferably, the type of the sub-module battery is different from that of the main module battery, and the sub-module battery includes the same type of battery or a combination of different types of batteries.
Preferably, the main module battery is a standard module, and the sub-module battery is a non-standard module.
A battery pack management method that manages a battery pack according to any one of claims 1 to 4 and operates in a battery management system of the battery pack, the battery pack management method comprising:
identifying a current driving scene of a vehicle;
searching a working mode matched with the current driving scene from a plurality of preset battery charging and discharging strategies, wherein the battery charging and discharging strategies comprise different working modes and setting of charging and discharging states of the main module battery and the auxiliary module battery in each working mode;
calling a battery charge and discharge strategy comprising the searched working mode;
and executing the called battery charge and discharge strategy.
Preferably, the battery pack management method further includes, after the battery charge and discharge strategy including the searched operation mode is called and before the called battery charge and discharge strategy is executed:
acquiring the charge states of the main module battery and the auxiliary module battery;
and judging whether the charge state meets the requirement of executing the called battery charge and discharge strategy, if so, executing the called battery charge and discharge strategy, and if not, correcting the called battery charge and discharge strategy.
Preferably, the battery charge and discharge strategy further includes a plurality of sub-modes for subdividing the working mode and setting the charge and discharge states of the main module battery and the sub-module battery under each sub-mode;
and/or the battery charging and discharging strategy further comprises setting of operation parameters of the main module battery and the auxiliary module battery.
A battery pack management system that manages a battery pack according to any one of claims 1 to 4 and operates in a battery management system of the battery pack, the battery pack management system comprising:
the scene identification module is used for identifying the current driving scene of the vehicle;
the mode matching module is used for searching a working mode matched with the current driving scene from a plurality of preset battery charging and discharging strategies, wherein the battery charging and discharging strategies comprise different working modes and setting the charging and discharging states of the main module battery and the auxiliary module battery in each working mode;
the strategy calling module is used for calling the battery charging and discharging strategy comprising the searched working mode;
and the strategy execution module is used for executing the called battery charging and discharging strategy.
Preferably, the battery pack management system further includes:
the state acquisition module is used for acquiring the charge states of the main module battery and the auxiliary module battery after the battery charge and discharge strategy comprising the searched working mode is called and before the called battery charge and discharge strategy is executed;
and the strategy correction module is used for judging whether the charge state meets the requirement of executing the called battery charge and discharge strategy, if so, calling the strategy execution module, and if not, correcting the called battery charge and discharge strategy.
Preferably, the battery charge and discharge strategy further includes a plurality of sub-modes for subdividing the working mode and setting the charge and discharge states of the main module battery and the sub-module battery under each sub-mode;
and/or the battery charging and discharging strategy further comprises setting of operation parameters of the main module battery and the auxiliary module battery.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: according to the battery pack, the main module battery, the auxiliary module battery and the battery management system are arranged in the same battery pack shell, so that the design of the battery pack is more flexible, the internal space of the battery pack shell is reasonably utilized, and the overall functional requirements of the battery pack are met; in addition, the method and the system select the matched battery charging and discharging strategy according to the current driving scene of the vehicle, further control the charging and discharging states of the main module battery and the auxiliary module battery, form interaction between the battery and the whole vehicle, automatically adjust the state of the battery pack, and improve the charging and discharging capacity of the whole battery pack and the dynamic property and the economical efficiency of the whole vehicle.
Drawings
Fig. 1 is a schematic structural diagram of a battery pack according to embodiment 1 of the present invention;
FIG. 2 is a layout diagram of a battery pack in a chassis space of a whole vehicle;
fig. 3 is a flowchart of a battery pack management method according to embodiment 2 of the present invention;
fig. 4 is a flowchart of a battery pack management method according to embodiment 3 of the present invention;
fig. 5 is a schematic block diagram of a battery pack management system according to embodiment 4 of the present invention;
fig. 6 is a schematic block diagram of a battery pack management system according to embodiment 5 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Fig. 1 shows a structure of a battery pack including a main module battery 1, a sub-module battery 2, a battery management system 3(BMS), and a battery pack case 4. The main module battery 1, the sub-module battery 2, and the battery management system 3 are provided in the battery pack case 4. The main module battery can be used as an energy source for providing main power of the whole vehicle, the auxiliary module battery can be used as an energy source for providing auxiliary power, and the main module battery and the auxiliary module battery can respectively and independently work or jointly work after being connected in series or in parallel. The main module battery 1 may be a modular, universal, modular, preferably occupying a substantial space within the battery pack housing 4 when arranged. The sub-module battery 2 may be a non-standard module, which is smaller in volume than the main module battery 1, and is dispersedly disposed in the remaining space between the battery pack case 4 and the main module battery 1. The overall shape of the battery pack housing 4 is adapted to the vehicle chassis space 5, and fig. 2 shows the arrangement of the battery pack in the vehicle chassis space.
In this embodiment, the following requirements are preferably used in selecting and designing the battery pack: the type of the main module battery 1 is selected according to the total requirement of the whole vehicle on the battery pack, wherein the total requirement comprises at least one of total electric quantity, total voltage and total output power, and the type can comprise the type or specification of a battery, such as a lithium battery; the internal cell connection circuit of the main module battery 1 is designed according to the voltage of an in-vehicle electrical voltage platform, and the connection circuit may include a series-parallel circuit of the internal cells of the main module battery, taking the electrical voltage platform as a motor voltage platform as an example, the connection circuit enables the voltage of the main module battery 1 to be matched with the motor voltage through series-parallel connection between the internal cells of the main module battery 1; the type of the secondary module battery 2 is selected according to the pressure difference between the primary module battery 1 and an electric voltage platform in the vehicle, wherein the type can comprise the type or specification of the battery, such as a nickel-hydrogen battery or a lead-acid battery and other cheap batteries; the arrangement position of the sub-module batteries 2 is set according to the remaining space between the battery pack case 4 and the main module battery 1.
Wherein the type of the selected sub-module battery 2 may be different from the type of the selected main module battery, and the sub-module battery 2 may further include the same type of battery or a different type of battery combination.
The battery package of this embodiment has set up master module group battery 1, vice module battery 2 and battery management system 3 with the battery package in same battery package shell for the design of battery package is more nimble, and the inner space of rational utilization battery package shell satisfies the whole functional requirement to the battery package simultaneously.
Overall, the selection of the main module battery 1 is relatively simple, and can be selected from the standardized modules specified by the country, such as the VDA355 module (355mm 152mm 108mm), 390 module (390mm 152mm 108mm), 590 module (590mm 225mm 108mm), and the module length, width, height, which are specified, so that the generalization is facilitated and the development cost is reduced. The selection of the secondary module battery 2 is more flexible, and it may be a non-standard module designed according to the remaining space of the primary module battery 1 in the battery pack case and the battery characteristics. For example, the main module battery 1 is a lithium battery, but the electrochemical characteristics of the lithium battery are usually fixed in a region, such as a charging and discharging region (the working voltage of the ternary lithium batteries 3 connected in parallel and 4 connected in series (3P4S) is 10V-17.2V, more preferably, the working voltage of the ternary lithium batteries is 11.2V-12.8V, and the whole battery pack is multiplied by the number of the modules connected in series) and a rated voltage (the ternary lithium batteries 3 connected in parallel and 4 connected in series (3P4S) is 14.4-14.8V, usually, the voltage of the battery pack is multiplied by the number of the modules connected in series), so that the formed battery voltage platform is difficult to be perfectly matched with other electrical components in the vehicle. In addition to the voltage plateau, the dimensional profile of the battery design also results in a large amount of space remaining for the placement of the main module battery 1 within the battery pack housing 4. The auxiliary module battery 2 is used as supplement and decoration of the main module battery, is arranged in the residual space of the main module battery 1, improves the voltage platform matching degree of the main module battery 1 and other electric parts, can select batteries with lower cost such as nickel-metal hydride batteries or lead-acid batteries and the like, can save the cost under the condition of not reducing the quality of a battery pack, and improves the competitiveness of the battery pack.
Example 2
Fig. 3 shows a battery pack management method of the present embodiment, which manages the battery pack in embodiment 1 and operates in a battery management system of the battery pack. The battery pack management method comprises the following steps:
step S1: a current driving scene of the vehicle is identified.
Step S2: and searching a working mode matched with the current driving scene from a plurality of preset battery charging and discharging strategies. The battery charging and discharging strategy comprises different working modes and setting of charging and discharging states of the main module battery and the auxiliary module battery in each working mode.
Step S3: and calling a battery charging and discharging strategy comprising the searched working mode.
Step S4: and executing the called battery charge and discharge strategy.
In this embodiment, the driving scene of the vehicle, the operating mode of the battery pack, and the specific battery charging/discharging strategy may all be determined according to actual conditions or requirements. For example: the driving scene of the vehicle can be the division of the vehicle running state, including but not limited to no start, acceleration, rapid acceleration, uniform speed, idle speed, braking energy recovery and the like; the vehicle running environment can be divided, and the division includes but is not limited to road surface flatness, climbing gradient, wind resistance and the like. The operation mode may be a division of the battery charge and discharge requirements, including but not limited to a driving mode, a charging mode, and an energy recovery mode.
Taking the example of dividing the driving scene according to the vehicle running state, the matching relationship between the driving scene and the working mode may include, but is not limited to, matching the non-starting mode with the charging mode, matching the starting mode, the accelerating mode, the rapid accelerating mode, the uniform speed mode, the idle speed mode with the driving mode, and matching the braking energy recovery mode with the energy recovery mode. The battery charge and discharge strategy in the charge mode may include, but is not limited to, one of the primary and secondary module batteries being charged while the other is discharged or not operating, or both being charged. The battery charge and discharge strategy in the driving mode may include, but is not limited to, discharging one of the primary and secondary module batteries while the other is not operating, or discharging both in series or parallel. The battery charge-discharge strategy in the energy recovery mode may include, but is not limited to, charging one of the primary and secondary module batteries while the other is not operating, or both.
Certainly, under the requirement of more perfect and fine strategy, the working mode may be divided into more layers, for example, the battery charging and discharging strategy may further include a plurality of sub-modes for subdividing the working mode and setting the charging and discharging states of the main module battery and the sub-module battery in each sub-mode. The following table 1 schematically shows a specific battery charging and discharging strategy and the operable state of the vehicle drive system (including a DC-AC (direct current-alternating current) inverter, a motor and a speed reducing mechanism) under the strategy, wherein the battery pack, the DC-AC inverter, the motor and the speed reducing mechanism are connected in series in sequence:
TABLE 1
Figure BDA0002262022370000071
Based on table 1, the method can more specifically set the charge and discharge states of the main module battery and the sub-module battery according to the sub-mode, and further set the operation state of the drive system.
In order to further refine the battery charging and discharging strategy and achieve precise management of the battery pack, the battery charging and discharging strategy may further include specific limitations on operation parameters of the main module battery and the sub-module battery, for example, in a certain climbing scenario, the voltage and current settings of the main module battery and the sub-module battery in the series driving mode.
The battery pack management method of the embodiment formulates diversified battery charging and discharging strategies to meet different management requirements; the method also selects a matched battery charging and discharging strategy according to the current driving scene of the vehicle, so as to control the charging and discharging states of the main module battery and the auxiliary module battery, form interaction between the battery and the whole vehicle, and automatically adjust the state of the battery pack, thereby improving the charging and discharging capacity of the whole battery pack and the dynamic property and the economical efficiency of the whole vehicle.
Example 3
This example is a further improvement over example 2. In order to ensure that the invoked battery charging and discharging strategy conforms to the actual operating state of the battery pack, the battery pack management method of the embodiment further includes, as shown in fig. 4, after step S3 and before step S4:
s31: acquiring the charge states of the main module battery and the auxiliary module battery;
s32: and judging whether the state of charge meets the invoked battery charging and discharging strategy, if so, executing step S4, otherwise, executing step S5.
Step S5: and modifying the called battery charge and discharge strategy.
The newly added steps play a role in verifying whether the battery charging and discharging strategy can be executed or not, the effectiveness of strategy execution is ensured through the charge state of the battery, and the failure of strategy execution caused by the mismatching of the charge states of the main module battery and the auxiliary module battery and the battery charging and discharging strategy is avoided. For example, the state of charge of the primary module battery is 80%, the state of charge of the secondary module battery is 10%, and the battery charging and discharging strategy to be executed sets that both the primary module battery and the secondary module are discharged, so that the state of charge of the secondary module battery cannot meet the discharging requirement, and the primary module battery alone needs to be preferably corrected to be discharged.
Example 4
Fig. 5 shows a battery pack management system of the present embodiment. The system manages the battery pack in embodiment 1, and operates in a battery management system of the battery pack. . The battery pack management system includes a scene recognition module 61, a pattern matching module 62, a policy retrieval module 63, and a policy execution module 64. The scene recognition module 61 is configured to recognize a current driving scene of the vehicle. The pattern matching module 62 is configured to search for a working pattern matched with a current driving scenario from a plurality of preset battery charging and discharging strategies. The battery charging and discharging strategy comprises different working modes and setting of charging and discharging states of the main module battery and the auxiliary module battery in each working mode. The strategy retrieving module 63 is configured to retrieve a battery charging and discharging strategy including the found operating mode. The strategy execution module 64 is used for executing the called battery charge and discharge strategy.
In this embodiment, the driving scene of the vehicle, the operating mode of the battery pack, and the specific battery charging/discharging strategy may all be determined according to actual conditions or requirements. For example: the driving scene of the vehicle can be the division of the vehicle running state, including but not limited to no start, acceleration, rapid acceleration, uniform speed, idle speed, braking energy recovery and the like; the vehicle running environment can be divided, and the division includes but is not limited to road surface flatness, climbing gradient, wind resistance and the like. The operation mode may be a division of the battery charge and discharge requirements, including but not limited to a driving mode, a charging mode, and an energy recovery mode.
Taking the example of dividing the driving scene according to the vehicle running state, the matching relationship between the driving scene and the working mode may include, but is not limited to, matching the non-starting mode with the charging mode, matching the starting mode, the accelerating mode, the rapid accelerating mode, the uniform speed mode, the idle speed mode with the driving mode, and matching the braking energy recovery mode with the energy recovery mode. The battery charge and discharge strategy in the charge mode may include, but is not limited to, one of the primary and secondary module batteries being charged while the other is discharged or not operating, or both being charged. The battery charge and discharge strategy in the driving mode may include, but is not limited to, discharging one of the primary and secondary module batteries while the other is not operating, or discharging both in series or parallel. The battery charge-discharge strategy in the energy recovery mode may include, but is not limited to, charging one of the primary and secondary module batteries while the other is not operating, or both.
Certainly, under the requirement of more perfect and fine strategy, the working mode may be divided into more layers, for example, the battery charging and discharging strategy may further include a plurality of sub-modes for subdividing the working mode and setting the charging and discharging states of the main module battery and the sub-module battery in each sub-mode. The system can more specifically set the charge and discharge states of the main module battery and the auxiliary module battery according to the sub-mode, and further set the running state of the driving system.
In order to further refine the battery charging and discharging strategy and achieve precise management of the battery pack, the battery charging and discharging strategy may further include specific limitations on operation parameters of the main module battery and the sub-module battery, for example, in a certain climbing scenario, the voltage and current settings of the main module battery and the sub-module battery in the series driving mode.
In this embodiment, the battery pack management system may be operated in a battery management system of a battery pack.
The battery pack management system of the embodiment divides the battery pack into the main module battery and the auxiliary module battery, and each module battery can independently control the charging and discharging state, so that the charging and discharging setting of the whole battery pack is more diversified, and a good basis is provided for the effective management of the battery pack; the system also makes diversified battery charging and discharging strategies to meet different management requirements; the system also selects a matched battery charging and discharging strategy according to the current driving scene of the vehicle, so that the charging and discharging states of the main module battery and the auxiliary module battery are controlled, interaction is formed between the battery and the whole vehicle, the state of the battery pack is automatically adjusted, and the charging and discharging capacity of the whole battery pack and the dynamic property and the economical efficiency of the whole vehicle are improved.
Example 5
This example is a further improvement over example 4. In order to ensure that the called battery charging and discharging strategy conforms to the actual operating state of the battery pack, the battery pack management system of the embodiment further includes a state obtaining module 65 and a strategy correcting module 66, as shown in fig. 6.
The state acquisition module 65 is configured to acquire the states of charge of the primary module battery and the secondary module battery.
The strategy modification module 66 is configured to determine whether the state of charge satisfies a policy for executing the called battery charge/discharge, if so, the strategy execution module 64 is called, and if not, the called battery charge/discharge strategy is modified.
The newly added modules 65 and 66 play a role in verifying whether the battery charging and discharging strategy can be executed or not, the effectiveness of strategy execution is ensured through the charge state of the battery, and the strategy execution failure caused by the mismatching of the charge states of the main module battery and the auxiliary module battery and the battery charging and discharging strategy is avoided. For example, the state of charge of the primary module battery is 80%, the state of charge of the secondary module battery is 10%, and the battery charging and discharging strategy to be executed sets that both the primary module battery and the secondary module are discharged, so that the state of charge of the secondary module battery cannot meet the discharging requirement, and the primary module battery alone needs to be preferably corrected to be discharged.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (10)

1. A battery pack, comprising:
a battery pack housing;
the battery pack comprises a main module battery, an auxiliary module battery and a battery management system which are arranged in a battery pack shell, wherein the main module battery and the auxiliary module battery respectively and independently work or jointly work after being connected in series or in parallel.
2. The battery pack according to claim 1, wherein the type of the main module battery is selected according to total requirements of a finished vehicle on the battery pack, wherein the total requirements include at least one of total electric quantity, total voltage and total output power;
an internal electric core connecting circuit of the main module battery is designed according to the voltage of an electric voltage platform in the vehicle;
the type of the auxiliary module battery is selected according to the pressure difference between the main module battery and the electric voltage platform in the vehicle;
the arrangement position of the secondary module battery is set according to the remaining space between the battery pack case and the primary module battery.
3. The battery pack according to claim 1, wherein the type of the sub-module battery is different from the type of the main module battery, and the sub-module battery includes the same type of battery or a combination of different types of batteries.
4. The battery pack according to claim 1, wherein the main module battery is a standard module and the sub-module battery is a non-standard module.
5. A battery pack management method, wherein the battery pack management method manages the battery pack according to any one of claims 1 to 4, and is operated in a battery management system of the battery pack, and the battery pack management method includes:
identifying a current driving scene of a vehicle;
searching a working mode matched with the current driving scene from a plurality of preset battery charging and discharging strategies, wherein the battery charging and discharging strategies comprise different working modes and setting of charging and discharging states of the main module battery and the auxiliary module battery in each working mode;
calling a battery charge and discharge strategy comprising the searched working mode;
and executing the called battery charge and discharge strategy.
6. The battery pack management method according to claim 5, further comprising, after calling the battery charge and discharge strategy including the searched operation mode and before executing the called battery charge and discharge strategy:
acquiring the charge states of the main module battery and the auxiliary module battery;
and judging whether the charge state meets the requirement of executing the called battery charge and discharge strategy, if so, executing the called battery charge and discharge strategy, and if not, correcting the called battery charge and discharge strategy.
7. The battery pack management method according to claim 5, wherein the battery charge/discharge strategy further includes a plurality of sub-modes that subdivide the operation mode and setting of charge/discharge states of the main module battery and the sub-module battery in each sub-mode;
and/or the battery charging and discharging strategy further comprises setting of operation parameters of the main module battery and the auxiliary module battery.
8. A battery pack management system that manages a battery pack according to any one of claims 1 to 4 and operates in a battery management system of the battery pack, the battery pack management system comprising:
the scene identification module is used for identifying the current driving scene of the vehicle;
the mode matching module is used for searching a working mode matched with the current driving scene from a plurality of preset battery charging and discharging strategies, wherein the battery charging and discharging strategies comprise different working modes and setting the charging and discharging states of the main module battery and the auxiliary module battery in each working mode;
the strategy calling module is used for calling the battery charging and discharging strategy comprising the searched working mode;
and the strategy execution module is used for executing the called battery charging and discharging strategy.
9. The battery pack management system according to claim 8, further comprising:
the state acquisition module is used for acquiring the charge states of the main module battery and the auxiliary module battery after the battery charge and discharge strategy comprising the searched working mode is called and before the called battery charge and discharge strategy is executed;
and the strategy correction module is used for judging whether the charge state meets the requirement of executing the called battery charge and discharge strategy, if so, calling the strategy execution module, and if not, correcting the called battery charge and discharge strategy.
10. The battery pack management system according to claim 8, wherein the battery charge/discharge strategy further includes a plurality of sub-modes that subdivide the operation mode and settings of charge/discharge states of the main module battery and the sub-module battery in each sub-mode;
and/or the battery charging and discharging strategy further comprises setting of operation parameters of the main module battery and the auxiliary module battery.
CN201911074584.6A 2019-11-06 2019-11-06 Battery pack and management method and system thereof Pending CN112757882A (en)

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TW201220642A (en) * 2010-11-05 2012-05-16 Neotec Semiconductor Ltd Battery module and method of reducing waiting time in charging phase and safety using the same
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