CN114590138A - Electric vehicle battery pack system - Google Patents
Electric vehicle battery pack system Download PDFInfo
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- CN114590138A CN114590138A CN202210228044.4A CN202210228044A CN114590138A CN 114590138 A CN114590138 A CN 114590138A CN 202210228044 A CN202210228044 A CN 202210228044A CN 114590138 A CN114590138 A CN 114590138A
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 4
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 1
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- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
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- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Battery Mounting, Suspending (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The application discloses electric vehicle battery package system, including a plurality of parallelly connected subsystems, every same voltage platform's subsystem includes the same series battery module of a plurality of quantity, and the specification and size of the battery module in same subsystem is the same, and any subsystem supports the battery module of multiple different specification and size.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery pack system of an electric vehicle.
Background
At present, for a battery pack integration scheme of a new energy automobile main stream, the battery pack integration scheme is mainly from a battery core to a battery module in a grouping mode, and then the battery module to the battery pack. Although the conventional large-capacity square battery cell slowly becomes popular without module to pack (CTP) design, the essence is to simplify the module structure or to increase the size of the module, and the design concept of the module is still maintained. Currently, for different electric vehicles, a special battery module needs to be designed, so that the cost of the battery pack is high.
Disclosure of Invention
The embodiment of the application aims to provide an electric vehicle battery pack system which is used for solving the problem that an existing vehicle battery pack is high in cost.
In order to solve the above technical problem, the present specification is implemented as follows:
in a first aspect, an electric vehicle battery pack system is provided, comprising: the system comprises a plurality of subsystems connected in parallel, each subsystem with the same voltage platform comprises a plurality of series-connected battery modules with the same quantity, the specification sizes of the battery modules in the same subsystem are the same, and any subsystem supports various battery modules with different specification sizes.
Alternatively, the number of sub-systems and the number of battery modules included in each sub-system are determined according to the size of the battery modules included in the sub-system and the size of the battery pack of the electric vehicle.
Optionally, the plurality of subsystems are sequentially arranged along a first direction of the battery pack, the plurality of battery modules included in each subsystem are sequentially arranged along a second direction of the battery pack,
wherein the number of subsystems in the battery pack, the specification size and the number of battery modules in each subsystem are determined according to different specification sizes of the battery modules and the battery pack size of the target electric vehicle.
Optionally, the different specifications of the battery modules include different sizes of the battery modules along the first direction, the first direction corresponds to the length direction of the vehicle body wheelbase of the target electric vehicle,
wherein a first dimension of the battery pack in the first direction is determined according to a vehicle body wheelbase of the target electric vehicle, and the number of subsystems in the battery pack and a specification dimension of the battery module in each subsystem in the first direction are determined according to the first dimension.
Optionally, the different specifications and sizes of the battery modules include different sizes of the battery modules along a third direction, the third direction corresponds to the height direction of the vehicle body of the target electric vehicle,
wherein a third dimension of the battery pack in the third direction is determined according to the body height of the target electric vehicle, and a specification dimension of the battery module in each subsystem in the battery pack in the third direction is determined according to the third dimension.
Optionally, the battery modules have the same size along the second direction, the second direction corresponds to the vehicle body width direction of the target electric vehicle, and the battery packs have the same second size along the second direction.
Optionally, the battery module type that corresponds in every subsystem includes at least one of cylinder electricity core, square electricity core and laminate polymer battery core, and the battery module's of same battery subsystem electric core type is the same.
Optionally, each size of battery module matches two or more voltage versions with the same capacity, or each size of battery module matches two or more capacity versions with the same voltage.
Optionally, the voltage versions include a high voltage version and a low voltage version, and the capacity versions include a ternary high capacity version and a lithium iron phosphate low capacity version.
In the embodiment of the application, the system comprises a plurality of subsystems connected in parallel, each subsystem of the same voltage platform comprises a plurality of series-connected battery modules with the same quantity, the specification and the size of the battery modules in the same subsystem are the same, any subsystem supports the battery modules with various specifications, and therefore the battery pack system is formed by randomly matching the battery modules with different specifications, and the battery packs with different sizes and capacities can be matched at lower cost to be compatible with the change of different vehicle types.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a block diagram showing a structure of an electric vehicle battery pack system according to an embodiment of the present application.
Fig. 2 is a schematic view of battery modules of different sizes according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a battery pack according to a first embodiment of the present application.
Fig. 4 is a schematic diagram of a battery pack according to a second embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.
In order to solve the problems in the prior art, an embodiment of the present application provides an electric vehicle battery pack system, which includes a plurality of subsystems connected in parallel, where each subsystem of the same voltage platform includes a plurality of series-connected battery modules with the same number, the battery modules in the same subsystem have the same specification and size, and any subsystem supports a plurality of battery modules with different specification and size.
Fig. 1 is a block diagram of a structure of an electric vehicle battery pack system according to an embodiment of the present application, and as shown in fig. 1, an electric vehicle battery pack system 100 includes a plurality of subsystems, a subsystem 1, a subsystem 2, and a subsystem N, each subsystem includes a battery module, a battery management system, and an electrical control system, the number of battery modules in each subsystem is greater than or equal to two, and the number of battery modules included in different subsystems is equal to each other. A plurality of battery modules with the same specification and size are connected in series to output system voltage, serve as an independent subsystem, and are provided with an independent battery management system and an independent electric control system.
As shown in fig. 1, the electric vehicle battery pack system 100 includes N subsystems 1 including a battery module 1, a battery management system 1, and an electrical control system 1, a subsystem 2 including a battery module 2, a battery management system 2, and an electrical control system 2, … …, and so on, and a subsystem N including a battery module N, a battery management system N, and an electrical control system N.
Here, the battery modules 1,2, … …, N represent a module combination including N identical battery modules, and N is 2 or more. That is, n identical battery modules a are included in the battery module 1, and n identical battery modules B are included in the battery module 2, but the size specification of the battery module a included in the battery module 1 may be different from that of the battery module B included in the battery module 2.
The voltage output by each subsystem is the same, the capacity of the battery module is related to the size of the battery module, and the larger the size is, the higher the capacity is. A plurality of subsystems are connected in parallel, so that a battery system with larger energy can be formed. The nominal voltages of the n types of battery modules are the same. n kinds of battery module is applicable in the cylinder electric core of same model, and applicable electrical property is close but the square or the laminate polymer battery core of thickness difference and capacity difference.
The specification and size of the battery module can correspond to various different preset sizes, for example, one specification and size type is that the width and the height of the battery module are not changed, and the length has different size and size; one is that the width and length of the battery module are constant and the height has different dimensions.
Referring to fig. 2, taking the different dimensions corresponding to the lengths of the battery modules as An example, the widths of the battery modules a1, a2, A3 and a … … are all W (a1), and the heights are the same (not shown). The n types of battery modules are different in length and size, and the difference is delta L1, delta L2, delta Ln-1. That is, L (a1) -L (a2) ═ Δ L1, L (a2) -L (A3) ═ Δ L2,.. and.l (An-1) -L (An) ═ Δ Ln-1. The length size difference between different battery modules is determined according to the minimum variation difference of the wheelbases of different electric vehicles.
Referring to fig. 3, taking the different dimensions corresponding to the heights of the battery modules as An example, the battery modules An and the battery modules Bn have the same length, i.e., a (ln) or b (ln), and have the same width (not shown). The battery modules An, Bn with the same width and the same length are arranged in two heights, for example, the height of the battery module An is A (Hn), the height of the battery module Bn is B (Hn), and B (Hn) > A (Hn).
The battery modules in the same subsystem have the same specification and size, namely the length, width and height of the battery modules are the same. For the same battery pack system, the battery modules in any subsystem can support the selection of battery modules with different specifications and sizes to form the subsystem. The term "support" is used herein to mean that each subsystem can be combined to obtain a desired battery pack length according to different predetermined specifications of battery modules, for example, corresponding dimensions with the same width but different lengths, and any suitable length specification can be selected from the corresponding dimensions.
For example, in the case of a battery pack system including the sub-systems 1,2, and 3, the battery module of the sub-system 1 may have a size a different from the size B of the battery modules of the sub-systems 2 and 3. However, gauge a and gauge B need to be of the same gauge type. The corresponding heights of the specification sizes A and B are different, but the widths and the lengths of the specification sizes A and B are the same, and the specification sizes A and B correspond to a first specification size type; the sizes A and B are different in length, but the widths and heights of the sizes A and B are the same, and the sizes A and B correspond to a second size type. However, the same battery pack system is only composed of battery modules of the same specification and size type.
Taking the first specification size type for correspondingly distinguishing different heights as an example, for each subsystem in a battery pack, the length and the width of the battery modules included in the subsystem are determined in advance, and the electronic modules are the same, at this time, the subsystem can be composed of at least two battery modules with different heights, namely, at least two subsystems with different heights are formed.
The use of a larger height dimension subsystem depends on the amount of space in the vehicle itself, such as an SUV with a larger body space or a sedan with a smaller body space.
In one embodiment, a subsystem having length and width dimensions may be configured with two heights. The two heights are distinguished to adapt to the SUV and the car, the matching combination of the two different heights can be simultaneously supported for the SUV type vehicle, and the battery module with the lower car type can only be adapted to the battery module with the lower height.
In the case of a vehicle space viable SUV, there are two height options available for each subsystem. Since the subsystems at different heights must have different energies, the battery pack can be matched to more capacity configurations.
Based on the solutions provided in the above embodiments, optionally, the number of subsystems and the number of battery modules included in each subsystem are determined according to the size of the battery modules included in the subsystem and the size of the battery pack of the electric vehicle.
Specifically, the maximum number of the subsystems is determined by the size of the battery module included in the subsystem and the size of the battery pack in the wheel base direction corresponding to the vehicle body. The number of battery modules included in each subsystem is determined by the width of the battery modules (affected by the size of the battery cells) and the width of the battery pack.
Optionally, the plurality of subsystems are sequentially arranged along a first direction of the battery pack, and the plurality of battery modules included in each subsystem are sequentially arranged along a second direction of the battery pack, wherein the number of the subsystems in the battery pack, and the specification size and the number of the battery modules in each subsystem are determined according to different specification sizes of the battery modules and the size of the battery pack of the target electric vehicle.
For a prismatic battery pack, the first direction of the battery pack may be a length direction of the battery pack, and the second direction of the battery pack may be a width direction of the battery pack. The reverse is also true. The first direction of the battery pack corresponds to the length direction of the wheel base of the vehicle body of the target electric vehicle, and the second direction corresponds to the width direction of the vehicle body of the target electric vehicle. The target electric vehicle is a vehicle that needs to be fitted with a battery pack of a corresponding matching size according to the vehicle type. And selecting the battery modules with corresponding specification and size to form a subsystem according to the vehicle type and capacity requirements of the target electric vehicle, so as to obtain the battery pack size matched with the target electric vehicle.
In one example, optionally, the different specifications of the battery modules include different sizes of the battery modules along the first direction, the first direction corresponds to the length direction of the vehicle body wheel base of the target electric vehicle, wherein the first size of the battery pack along the first direction is determined according to the vehicle body wheel base of the target electric vehicle, and the number of subsystems in the battery pack and the specification size of the battery module in each subsystem along the first direction are determined according to the first size.
In this embodiment, the number of required subsystems may be determined from a plurality of preset battery modules having different length specifications according to the vehicle body wheelbase size of the target electric vehicle. For example, if the wheelbase of the vehicle body is Lc and the length of the correspondingly adapted battery pack is Ld, the length specification of the battery module capable of adapting to the length Ld of the battery pack is selected according to the length Ld and a plurality of preset length specification sizes of the battery module. For example, if the length Lm of three different length specification combinations is adapted to the battery pack length Ld, the number of corresponding subsystems is three. And determining the number of the battery modules with the corresponding length specification size included in each subsystem by combining the capacity size of the battery pack required by the target electric vehicle.
Taking fig. 4 as an example, x represents a first direction of the battery pack, that is, a vehicle body width direction of the corresponding electric vehicle; y denotes a second direction of the battery pack, i.e., a body length direction of the corresponding electric vehicle. The battery modules have preset length specifications of L1, L2, and L3.
As shown in fig. 4 (a), according to the size of the vehicle body wheelbase of the target electric vehicle, the dimension of the battery pack in the y direction can be determined to be 3L1, and then it can be determined that three subsystems are selected to constitute the battery pack of the vehicle, and the length specification of the battery module in each subsystem is L1. The number of battery modules included in each subsystem is determined to be 5 according to the capacity size of the battery pack required by the target electric vehicle. Thereby, a battery pack consisting of 3 × 5 battery modules of corresponding length specifications is obtained, which can be fitted to the target electric vehicle.
As shown in fig. 4 (b), the dimension of the battery pack in the y direction can be determined to be (L1+2L2) according to the size of the vehicle body wheelbase of the target electric vehicle, and then three subsystems can be selected to form the battery pack of the vehicle, wherein the length specifications of the battery modules in the three subsystems are L1, L2 and L2 respectively. The number of battery modules included in each subsystem is determined to be 5 according to the capacity size of the battery pack required by the target electric vehicle. Thereby, a battery pack consisting of 3 × 5 battery modules of corresponding length specifications is obtained, which can be fitted to the target electric vehicle.
As shown in fig. 4 (c), the dimension of the battery pack in the y direction can be determined to be (L2+ L3) according to the size of the vehicle body wheelbase of the target electric vehicle, and then two subsystems can be selected to constitute the battery pack of the vehicle, wherein the length specifications of the battery modules in the two subsystems are L3 and L2 respectively. The number of battery modules included in each subsystem is determined to be 5 according to the capacity size of the battery pack required by the target electric vehicle. Thereby, a battery pack consisting of 2 × 5 battery modules of corresponding length specifications is obtained, which can be fitted to the target electric vehicle.
This embodiment combines and fits battery packs of different sizes by changing only the y-direction length of the battery pack, so that the battery module can be shared among different vehicle models. Only the lower length size needs to be adjusted, and the different requirements of different wheelbases can be better compatible in an economical mode.
In one example, optionally, the different specifications of the battery modules include different sizes of the battery modules in a third direction, the third direction corresponds to a height direction of a vehicle body of a target electric vehicle, wherein the third size of the battery pack in the third direction is determined according to the height direction of the vehicle body of the target electric vehicle, and the specification of the battery module in each subsystem of the battery pack in the third direction is determined according to the third size.
The battery module corresponds the direction of height of automobile body, allows to have at least two optional height specification sizes.
The third direction of the battery pack may refer to the z direction of fig. 3, and in this embodiment, the number of subsystems required for the battery pack of the target electric vehicle and the number of battery modules in each subsystem are determined according to the vehicle body wheelbase, the vehicle body width, and the length and the width of the battery modules of the target electric vehicle. According to the height of the vehicle body of the target electric vehicle and the required capacity of the battery pack, a plurality of preset battery modules with different height specifications and sizes can be selected from the battery modules with the same length and width specifications. Therefore, the battery pack formed by the obtained battery modules can be adapted to the target electric vehicle.
This embodiment combines and fits battery packs of different sizes by changing only the z-direction height of the battery pack, so that the battery module can be shared among different vehicle models. Only the lower height size needs to be adjusted, and the difference requirements of the small sedan and the SUV can be better met.
Optionally, the battery modules have the same size along a second direction, the second direction corresponds to the width direction of the vehicle body of the target electric vehicle, and the battery packs have the same second size along the second direction.
In this application embodiment, the width of battery module is fixed unchangeable, and the width that corresponds the automobile body width's that the corresponding combination obtained battery package is fixed value.
The corresponding dimension, length or height of the different battery packs after combination can be adjusted according to the combination scheme of the battery module, and the adjustable range is determined by the different dimension of the battery module. The battery packs composed of different subsystems have different corresponding capacities, and the capacity variation range of each battery pack is determined by the preset capacity of the battery module included in the battery pack.
In one embodiment, each of the size-sized battery modules matches two or more voltage versions at the same capacity, or each of the size-sized battery modules matches two or more capacity versions at the same voltage.
The voltage versions comprise a high voltage version and a low voltage version, and the capacity versions comprise a ternary high capacity version and a lithium iron phosphate low capacity version.
Each size specification has more than two voltage versions, which can match, for example, 400V, 800V voltage platforms. Each size has two or more versions of the electric core system, for example, a high capacity version is realized by using ternary high capacity, and a low capacity version is realized by using lithium iron phosphate.
In the embodiment of the application, the system comprises a plurality of subsystems connected in parallel, each subsystem with the same voltage platform comprises a plurality of series-connected battery modules with the same quantity, the specification and the size of the battery modules in the same subsystem are the same, any subsystem supports the battery modules with various specifications, and therefore the battery pack system is formed by randomly matching the battery modules with different specifications, the battery packs with different sizes and capacities can be matched at lower cost, and the system is compatible with the change of different wheelbases and vehicle types.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. An electric vehicle battery pack system is characterized by comprising a plurality of subsystems connected in parallel, each subsystem with the same voltage platform comprises a plurality of battery modules connected in series in the same number,
the battery modules in the same subsystem have the same specification and size, and any subsystem supports various battery modules with different specifications and sizes.
2. The system of claim 1, wherein the number of subsystems and the number of battery modules included in each subsystem are determined according to the size of the battery modules included in the subsystems and the battery pack size of the electric vehicle.
3. The system of claim 2, wherein the plurality of subsystems are arranged in series along a first direction of the battery pack, each subsystem includes a plurality of battery modules arranged in series along a second direction of the battery pack,
the number of subsystems in the battery pack, and the specification size and the number of the battery modules in each subsystem are determined according to different specification sizes of the battery modules and the size of the battery pack of the target electric vehicle.
4. The system according to claim 3, wherein the different specification sizes of the battery modules include a difference in size of the battery modules in the first direction corresponding to a length direction of a body wheelbase of the target electric vehicle,
wherein a first dimension of the battery pack in the first direction is determined according to a vehicle body wheelbase of the target electric vehicle, and the number of subsystems in the battery pack and a specification dimension of the battery module in each subsystem in the first direction are determined according to the first dimension.
5. The system according to claim 3, wherein the different specification sizes of the battery modules include a difference in size of the battery modules in a third direction corresponding to a body height direction of the target electric vehicle,
wherein a third dimension of the battery pack in the third direction is determined according to the body height of the target electric vehicle, and a specification dimension of the battery module in each subsystem in the battery pack in the third direction is determined according to the third dimension.
6. The system according to claim 4 or 5, wherein the battery modules are identical in size in the second direction corresponding to the vehicle body width direction of the target electric vehicle, and the battery packs are identical in second size in the second direction.
7. The system of any one of claims 1-5, wherein the cell types corresponding to the battery modules in each subsystem include at least one of a cylindrical cell, a square cell, and a pouch cell, and the cell types of the battery modules of the same battery subsystem are the same.
8. The system of any one of claims 1 to 5, wherein each size battery module matches two or more voltage versions at the same capacity, or each size battery module matches two or more capacity versions at the same voltage.
9. The system of claim 8, wherein the voltage versions include a high voltage version and a low voltage version, the capacity versions including a ternary high capacity version and a lithium iron phosphate low capacity version.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122524A (en) * | 2021-11-04 | 2022-03-01 | 惠州锂威新能源科技有限公司 | Lithium battery grouping method, battery pack and electronic product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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