CN114400414B - Battery cell module and battery pack - Google Patents
Battery cell module and battery pack Download PDFInfo
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- CN114400414B CN114400414B CN202210073989.3A CN202210073989A CN114400414B CN 114400414 B CN114400414 B CN 114400414B CN 202210073989 A CN202210073989 A CN 202210073989A CN 114400414 B CN114400414 B CN 114400414B
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- battery
- battery cell
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- accommodating
- cell module
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- 238000000034 method Methods 0.000 claims abstract description 11
- 230000004888 barrier function Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 description 11
- 239000004964 aerogel Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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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
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The application relates to the technical field of power batteries, in particular to a battery cell module and a battery pack, wherein the battery cell module comprises: the first shell is provided with a plurality of first accommodating parts for accommodating the battery cells; the second shell is provided with a plurality of second accommodating parts for accommodating the battery cells; the first shell is located above the second shell, the number of the first containing parts is smaller than that of the second containing parts, and the first containing parts and the second containing parts are arranged in a staggered mode. The battery cell module provided by the application can obviously improve the stability and safety of the battery cell in the battery pack, fully utilize the internal space of the battery pack, and has the advantages of convenient assembly process and greatly improved assembly efficiency.
Description
Technical Field
The application relates to the technical field of power batteries, in particular to a battery cell module and a battery pack.
Background
At present, most of the battery cells in the existing battery pack are assembled one by one, so that the assembly efficiency is low, the assembly process is complex, the capacity of the battery cells for bearing pressure and pressure in the battery pack is poor, the stability of the battery cells in the battery pack is affected, and each battery cell needs to be reinforced one by one due to the fact that the battery cells need to be arranged and stacked one by one, a large amount of internal space of the battery pack is occupied, the space utilization rate in the battery pack is low, and the energy density of the whole battery pack is also affected.
Disclosure of Invention
The application aims to provide a battery cell module and a battery pack, which are used for solving the technical problems of complex assembly process of a battery cell of the conventional battery pack and low utilization rate of the internal space of the battery pack in the prior art to a certain extent.
The application provides a battery cell module, comprising: a first housing formed with a plurality of first receiving parts for receiving the battery cells;
the second shell is provided with a plurality of second accommodating parts for accommodating the battery cells;
the first shell is located above the second shell, the number of the first containing parts is smaller than that of the second containing parts, and the first containing parts and the second containing parts are arranged in a staggered mode.
In the above technical solution, further, the first housing and the second housing each have a U-shaped structure; a plurality of first baffles are sequentially arranged in the first shell at intervals along a first direction, so that the inner space of the first shell is separated into a plurality of first accommodating parts which are arranged along the first direction;
a plurality of second baffles are sequentially arranged in the second shell at intervals along the first direction so as to separate the inner space of the second shell into a plurality of second accommodating parts which are arranged along the first direction;
the first barrier is not aligned with the second barrier.
In any of the above technical solutions, further, at least one electric core is disposed in each first accommodating portion, and when the number of electric cores in each first accommodating portion is more than one, a plurality of electric cores are disposed at intervals along the second direction;
at least one electric core is arranged in each second accommodating part, and when the number of the electric cores in each second accommodating part is more than one, the electric cores are arranged at intervals along a second direction;
the second direction is perpendicular to the first direction.
In any of the above technical solutions, further, the number of the first shells is at least two, at least two first shells are sequentially arranged along the first direction, and a predetermined interval is formed between two adjacent first shells.
In any of the above technical solutions, further, the heights of the first barrier and the second barrier are smaller than the thickness of the battery cell;
the first barrier and the second barrier are each formed with a guide portion.
In any one of the above-mentioned aspects, further, a first step portion is formed between one of the plurality of first cases and the second case;
a second step is formed between the other one of the plurality of first housings and the second housing;
the width of the first step part is 1/3-1/2 of the width of the battery cell; the width of the second step part is 1/5-1/3 of the width of the battery cell.
In any of the above technical schemes, further, the length of the battery cell is X, and X is more than or equal to 200mm and less than or equal to 600mm; the width of the battery cell is Y, and Y is more than or equal to 85mm and less than or equal to 175mm; the thickness Z of the battery cell is more than or equal to 50mm and less than or equal to 61mm.
In any of the above solutions, further, the battery cell module further includes a heat conducting member, the heat conducting member is disposed between the first housing and the second housing, and one surface of the largest battery cell area is in contact with the heat conducting member;
the surface with the largest area of the other cell is attached to the bottom wall surface of the groove body structure of the first accommodating part and the second accommodating part.
In any of the above technical solutions, further, a heat conduction medium is disposed inside the heat conduction member, the heat conduction member has a flat plate structure, and the thickness of the heat conduction member is 6-8.5mm.
The application also provides a battery pack which comprises a plurality of the battery cell modules according to any one of the technical schemes, so that the battery pack has all the beneficial technical effects of the battery cell modules, and the description is omitted.
Compared with the prior art, the application has the beneficial effects that:
the cell module provided by the application comprises: the first shell is provided with a plurality of first accommodating parts for accommodating the battery cells; the second shell is provided with a plurality of second accommodating parts for accommodating the second accommodating parts of the battery cells; the first shell is located above the second shell, the number of the first containing parts is smaller than that of the second containing parts, and the first containing parts and the second containing parts are arranged in a staggered mode.
The battery cell module provided by the application can obviously improve the stability and safety of the battery cell in the battery pack, fully utilize the internal space of the battery pack, and has the advantages of convenient assembly process and greatly improved assembly efficiency.
The battery pack provided by the application comprises the battery cell modules, and the number of the battery cell modules is multiple, so that the battery cells are arranged in the battery pack in a matrix form of multiple rows, multiple columns and multiple layers according to a certain rule, the internal space of the battery pack can be fully utilized, and the layout and trend of bus bars, wire harnesses and the like in the battery pack can be optimized, so that the battery cells have stronger stability and safety and higher energy density in the battery pack.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery cell module according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second housing of the battery cell module according to the embodiment of the present application;
fig. 3 is another view of the second housing of the battery module according to the embodiment of the present application;
fig. 4 is another schematic structural diagram of a battery cell module according to an embodiment of the present application.
Reference numerals:
1-first shell, 101-first accommodation part, 102-first baffle, 2-second shell, 201-second accommodation part, 202-second baffle, 3-heat conduction component, 301-liquid inlet pipe, 302-liquid outlet pipe, 4-electric core, 5-guide part, 6-first step part, 7-second step part, 8-preset interval, 9-fixed part, a-first direction, b-second direction.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown.
The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The following describes a battery cell module and a battery pack according to an embodiment of the present application with reference to fig. 1 to 4.
Referring to fig. 1 to 4, an embodiment of the present application provides a battery cell module including a first case 1, a second case 2, and a heat conductive member 3, wherein the first case 1 is formed with a plurality of first receiving parts 101, the second case 2 is formed with a plurality of second receiving parts 201, and the first receiving parts 101 and the second receiving parts 201 are each for receiving a battery cell 4. The first casing 1 is arranged above the second casing 2, the number of the first accommodating parts 101 is different from the number of the second accommodating parts 201, the number of the first accommodating parts 101 is smaller than the number of the second accommodating parts 201, preferably, the number of the first accommodating parts 101 is one less than the number of the second accommodating parts 201, so that the number of the electric cores 4 accommodated in the first casing 1 is smaller than the number of the electric cores 4 accommodated in the second casing 2, all the electric cores 4 in the first casing 1 and the second casing 2 are divided into an upper layer and a lower layer, the upper layer electric cores 4 in the first casing 1 and the lower layer electric cores 4 in the second casing 2 can be arranged in a staggered manner, the arrangement mode of the electric cores 4 not only can enable the upper layer electric cores 4 and the lower layer electric cores 4 to be stacked more stably, but also the first accommodating parts 101 and the second accommodating parts 201 are sequentially arranged tightly, and therefore the distance between the electric cores 4 and the electric cores 4 can be reduced, the inner space of the battery pack can be more effectively distributed, the inner space of the battery pack can be more efficiently arranged, and the battery pack can be more compact.
Further, the first housing 1 and the second housing 2 each have a U-shaped groove structure. Specifically, taking the first casing 1 as an example, the first casing 1 includes a first wall plate and a second wall plate that are parallel to each other and a bottom plate that is disposed between the first wall plate and the second wall plate, the first wall plate, the bottom plate and the second wall plate enclose a U-shaped structure together, and a plurality of first baffles 102 are sequentially disposed on the bottom plate at equal intervals along a first direction a, so that an inner space of the first casing 1 is divided into a plurality of first accommodating portions 101 sequentially arranged along the first direction a, each first accommodating portion 101 has a U-shaped groove structure, and each accommodating portion is internally provided with a battery cell 4, that is to say, two battery cells 4 disposed along the first direction a are separated by the first baffles 102, which can isolate two adjacent first accommodating portions 101, and space between the two first accommodating portions 101 is reduced to the greatest extent, thereby avoiding space waste. The second housing 2 is similar, and those skilled in the art will fully understand that the description thereof will not be repeated here.
It should be noted that, since the number of the first accommodating portions 101 is smaller than the number of the second accommodating portions 201, the cells 4 in the first housing 1 and the cells 4 in the second housing 2 are arranged in a staggered manner, that is, the first barrier and the second barrier 202 are not aligned, so as to ensure the staggered stacking stability of the upper and lower cells 4.
Preferably, the number of the second accommodating parts 201 is 7 or 9, the number of the first accommodating parts 101 is 6 and or 8, the number of the first accommodating parts 101 is one less than the number of the second accommodating parts 201, and in the case of layering and staggered stacking of the battery cells 4, the battery cells 4 are accommodated as much as possible, so that the energy density of the battery pack using the battery cell module is ensured.
Further, taking the second accommodating portion 201 as an example, the number of the battery cells 4 disposed in the second accommodating portion 201 may be one, at this time, the width of the second accommodating portion 201 is approximately equal to the width of each battery cell 4, and the length of the second accommodating portion 201 is approximately equal to the length of each battery cell 4, so as to ensure the stability of the battery cells 4 in the second accommodating portion 201. Preferably, in the present application, the number of the inner cells 4 of each second accommodating portion 201 is two, and the two cells 4 are sequentially arranged along the second direction b, where the first direction a is the length direction of the second housing 2 in the state shown in fig. 1, and the second direction b is the width direction of the second housing 2, where the width (distributed along the first direction a) of the second accommodating portion 201 is approximately the same as the width of each cell 4, and the length (distributed along the second direction b) of the second accommodating portion 201 is approximately the same as the sum of the lengths of the two cells 4, and in the process of assembling the present cell module into the housing of the battery pack, the cells 4 are first installed in each second accommodating portion 201, so that the plurality of cells 4 and the second housing 2 are installed as a whole at the designated position in the battery pack, and the first housing 1 is the same, so that the assembly efficiency and the assembly accuracy of the present cell module can be significantly improved.
More preferably, the both ends that distribute along second direction b of first casing 1 all are provided with the fixed part 9 that has sheet structure, fixed part 9 is formed with the connecting hole for install this electric core module back in the battery package, fixed part 9 can laminate with the fixed cross beam in the battery package, use fastener such as screw to pass the connecting hole and can be fixed in fixed cross beam with fixed part 9, can remove traditional electric core module from and adopt welded structure, need not to use the ribbon to fix, help simplifying the degree of difficulty and the loaded down with trivial details degree of the assembly process of this electric core module, also need not consider single electric core 4 to pile up one by one, the accumulated tolerance that produces when installing.
Further, when the number of the battery cells 4 in the second accommodating portion 201 is two, the length X of the single battery cell 4 is 20-300mm, so that the total length of the two battery cells 4 is about 400-600mm, the width Y of the single battery cell 4 is 200-300mm, and the thickness Z of the single battery cell 4 is 50-61mm for ensuring the energy density and the space utilization rate because the height of the existing battery pack is basically 130-145 mm.
When the number of the electric cores 4 in the second accommodating portion 201 is one, the length X of the single electric core 4 is 400-600mm, and the width and the height are unchanged, which is equivalent to combining the electric quantities of the two electric cores 4, so that the structure of the electric core module and the complexity of the assembly process can be simplified.
In addition, because the adjacent two first accommodating portions 101 and the adjacent two cells 4 in the second accommodating portion 201 are separated by the first barrier 102 and the second barrier 202, compared with the existing isolation mode adopting aerogel, aerogel is required to be arranged between the two cells 4, and the back adhesive paper of the aerogel is required to be removed before the aerogel is arranged, so that the complexity of the assembly process is increased, the assembly time is also increased, and meanwhile, the cost of the aerogel is very expensive. The battery cell module provided by the application can utilize an automatic machine to carry out gluing in the first accommodating part 101 and the second accommodating part 201 according to the required track, so that the labor cost is saved, and the cost of using aerogel can be saved.
It should be noted that, each of the battery cells 4 is provided with a pole, where the pole can be divided into an anode and a cathode, so as to facilitate circuit connection and cable layout to realize high-voltage connection; the poles of the plurality of cells 4 in the plurality of second receiving portions 201 distributed along the second direction b are distributed along the first direction a, that is, in this case, the poles of the cells 4 are disposed on the same side. The two cells 4 in the same second receiving portion 201 should be disposed facing away from each other in the second direction b, that is, the poles of the two cells 4 in the second receiving portion 201 are disposed facing outward, and the end faces of the two cells 4 facing away from the poles are close to each other or are bonded to each other. The manner in which the cells 4 in the first accommodation portion 101 are arranged is the same as described above, as will be well understood by those skilled in the art.
Preferably, the end surfaces of the two battery cells 4 in the second accommodating portion 201, on which the terminal posts are disposed, protrude by 1mm-3mm relative to the openings of the two end portions of the first accommodating portion 101 in the second direction b, so as to ensure that a reserved positional relationship exists between the battery cells 4 and the second accommodating portion 201 (or the second housing 2) when the battery cells 4 are assembled into the second accommodating portion 201 by using the automation equipment, so as to ensure that the automation equipment can automatically assemble by operating the reserved positions, and meanwhile, the terminal posts of the battery cells 4 are protruded relative to the second housing 2, so that connection and arrangement of subsequent buses, cables and the like can be facilitated. The first accommodating portion 101 is similar to the battery cell 4 in the first accommodating portion 101.
Further, the number of the first cases 1 is two, the total number of the first receiving parts 101 of the two first cases 1 is one less than the number of the second receiving parts 201, or the first case 1 is divided into two parts, the number of the first receiving parts 101 of the two parts of the first case 1 is the same, and the total number is one less than the number of the second receiving parts 201. The two or two-part first housings 1 are spaced apart such that a predetermined space 8 is formed between the adjacent two or two-part first housings 1, the predetermined space 8 being used for wiring or other necessary components of the battery pack.
Further, the first accommodating portion 101 and the second accommodating portion 201 each have a U-shaped groove structure with three openings, which are two end openings distributed along the second direction b and a top end opening facing the bottom wall surface, wherein the top end opening of the first accommodating portion 101 faces downward, the top end opening of the second accommodating portion 201 faces upward, and glue coating treatment is performed on the inner surface of the bottom wall surface of the first accommodating portion 101 and the inner surface of the bottom wall surface of the second accommodating portion 201, so that the battery cell 4 can be fixed on the first casing 1 and in the second casing 2 in an adhesive manner, so as to ensure the stability of the battery cell 4 in the first casing 1 and the second casing 2.
Further, the first barrier 102 and the second barrier 202 each have a flat plate structure, and the top end openings of the first barrier 102 and the second barrier 202 near the first accommodating portion 101 and the second accommodating portion 201 are suitably thinned to form the guide portion 5, and in the state shown in fig. 1 and 3, the thickness of the guide portion 5 of the first barrier 102 is gradually smaller in the top-to-bottom direction, and the thickness of the guide portion 5 of the second barrier 202 is gradually increased in the top-to-bottom direction, so that the battery cell 4 is arranged in the first accommodating portion 101 and the second accommodating portion 201. Further, the heights of the first barrier 102 and the second barrier 202 are slightly smaller than the thickness of the battery cell 4 and larger than the general thickness of the battery cell 4, so that the stability of the battery cell 4 in the first accommodating portion 101 and the second accommodating portion 201 can be ensured, and the first barrier 102 and the second barrier 202 can be prevented from interfering with the heat conduction effect between the battery cell 4 and the cooling member.
Preferably, both end wall plates of the first housing 1 and both end wall plates of the second housing 2 are also formed with guide portions 5.
Further, since the first housing 1 and the second housing 2 are arranged in a staggered manner, the first step portion 6 and the second step portion 7 are formed between the first housing 1 and the second housing respectively at two ends in the first direction a, the width of the first step portion 6 is preferably Y/3-Y/2, and the width of the second step portion 7 is preferably Y/5-Y/3, so that a reserved space is generated between the two first housings 1, a better wire harness space is provided in the reserved space, the arrangement and the trend of the cables are optimized, and meanwhile, the first step portion 6 and the second step portion 7 can also be used as mounting spaces for other necessary devices for mounting the battery pack, such as a busbar, a pole column and the like.
Further, the heat conductive member 3 has a flat plate structure, and the inside of the flat plate structure is hollow, the inside of the heat conductive member 3 flows with a heat conductive medium, the heat conductive member 3 is disposed between the first case 1 and the second case 2, and the lower surface of the cell 4 located in the first case 1 and the upper surface of the cell 4 located in the second case 2 are in contact with the upper and lower surfaces of the heat conductive member 3, respectively. Preferably, the length and width of the heat conductive member 3 are not smaller than the length and width of the second housing 2. More preferably, the battery cells 4 are disposed in the first accommodating portion 101 and the second accommodating portion 201 in a flat manner, so that two wall surfaces with the largest area of the battery cells 4 serve as an upper surface and a lower surface, so that a larger bonding area is formed between the upper surface of the battery cells 4 in the first accommodating portion 101 and the bottom wall surface of the tank body of the first accommodating portion 101, a larger contact area, namely, a heat conducting area is formed between the lower surface and the heat conducting member 3, and the battery cells 4 in the second accommodating portion 201 are arranged in the same manner, thereby ensuring the bonding strength between the battery cells 4 and the first housing 1 and the second housing 2, ensuring the heat conducting effect and the heat conducting efficiency between the battery cells 4 and the heat conducting member 3, and the battery cells 4 stacked in this way are also more stable and more reliable, and can bear stronger strength.
The heat conducting medium in the heat conducting member 3 may be a cooling liquid to absorb heat released during the discharging process of the battery cell 4 in a high temperature environment such as summer, and may be a liquid with a certain temperature after temperature rise, and the battery cell 4 is heated to a certain extent in a low temperature environment such as winter, so as to ensure that the battery cell 4 can work normally in the low temperature environment.
In addition, it should be noted that, because the wall surface with the larger area of the electric core 4 contacts with the heat conducting member 3, the thickness of the heat conducting member 3 can bear the weight of the first housing 1 and the electric cores 4 under the condition that the thickness of the heat conducting member 3 is 6-8.5mm and has a smaller thickness, so that the heat conducting member 3 is prevented from being damaged easily due to the excessive local pressure of the heat conducting member 3.
Further, the battery cell 4 is fixed with the heat conducting member 3 by means of gluing, preferably, the glue fixed between the battery cell 4 and the first housing 1 and the second housing 2 and the glue between the battery cell 4 and the heat conducting member 3 are structural glue with certain fluidity, so as to eliminate the problem of insufficient bonding area caused by the flatness of the first housing 1, the second housing 2 and the heat conducting member 3, and ensure the bonding strength of the battery cell 4.
Further, the heat conductive member 3 is provided with a liquid inlet pipe 301 and a liquid outlet pipe 302, the liquid inlet pipe 301 is used for injecting a heat conductive medium into the heat conductive member 3, the liquid outlet pipe 302 is used for discharging the heat conductive medium in the heat conductive member 3, preferably, the liquid inlet pipe 301 and the liquid outlet pipe 302 are arranged at the middle position of the upper surface of the heat conductive member 3 and are arranged at intervals along the second direction b, so that the liquid inlet pipe 301 and the liquid outlet pipe 302 can be just positioned in a preset interval between the two first shells 1, the wall surface influences the arrangement of the electric cores 4, and the inner space of the battery pack is fully utilized.
In summary, the battery cell module provided by the application can obviously improve the stability and safety of the battery cell in the battery pack, and can fully utilize the internal space of the battery pack, so that the assembly process is convenient and the assembly efficiency is greatly improved.
The embodiment of the application also provides a battery pack, which comprises a plurality of the battery cell modules according to any one of the embodiments, so that the battery pack has all the beneficial technical effects of the battery cell modules, and the description is omitted herein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (8)
1. A battery cell module, comprising: a first housing formed with a plurality of first receiving parts for receiving the battery cells;
the second shell is provided with a plurality of second accommodating parts for accommodating the battery cells;
the first shell is positioned above the second shell, the number of the first containing parts is smaller than that of the second containing parts, and the first containing parts and the second containing parts are arranged in a staggered mode;
the first shell and the second shell are provided with U-shaped structures, and openings of the U-shaped structures of the first shell and the openings of the U-shaped structures of the second shell are arranged in opposite directions; a plurality of first baffles are sequentially arranged in the first shell at intervals along a first direction, so that the inner space of the first shell is separated into a plurality of first accommodating parts which are arranged along the first direction;
a plurality of second baffles are sequentially arranged in the second shell at intervals along the first direction so as to separate the inner space of the second shell into a plurality of second accommodating parts which are arranged along the first direction;
the first barrier is not aligned with the second barrier; adjacent two cells are separated by the first barrier or the second barrier;
a first step is formed between one of the first housings and the second housing;
a second step is formed between the other one of the plurality of first housings and the second housing;
the first step portion and the second step portion serve as mounting spaces for mounting necessary devices of the battery pack;
the heights of the first baffle and the second baffle are smaller than the thickness of the battery cell;
the first baffle and the second baffle are both formed with guide parts; the thickness of the guide part of the first baffle is gradually reduced along the direction from top to bottom, and the thickness of the guide part of the second baffle is gradually increased along the direction from top to bottom;
in the process of assembling the battery cell module into the shell of the battery pack, the battery cells are firstly installed in each second accommodating part and each first accommodating part, the second shell and the battery cells are integrally installed at the appointed position in the battery pack, and the first shell and the battery cells are integrally installed at the appointed position in the battery pack.
2. The battery cell module of claim 1, wherein at least one battery cell is disposed in each first accommodating portion, and when the number of battery cells in each first accommodating portion is more than one, a plurality of battery cells are disposed at intervals along a second direction;
at least one electric core is arranged in each second accommodating part, and when the number of the electric cores in each second accommodating part is more than one, the electric cores are arranged at intervals along a second direction;
the second direction is perpendicular to the first direction.
3. The battery cell module of claim 1, wherein the number of the first housings is at least two, at least two of the first housings are sequentially arranged along the first direction, and a predetermined interval is formed between two adjacent first housings.
4. The battery cell module of any one of claim 1 to 3,
the width of the first step part is 1/3-1/2 of the width of the battery cell; the width of the second step part is 1/5-1/3 of the width of the battery cell.
5. The cell module of claim 4, wherein the length of the cell is X,200mm < X < 600mm; the width of the battery cell is Y, and Y is more than or equal to 85mm and less than or equal to 175mm; the thickness Z of the battery cell is more than or equal to 50mm and less than or equal to 61mm.
6. The battery cell module according to any one of claims 1 to 3, further comprising a heat conductive member disposed between the first housing and the second housing, one surface of the largest battery cell area being in contact with the heat conductive member;
the surface with the largest area of the other cell is attached to the bottom wall surface of the groove body structure of the first accommodating part and the second accommodating part.
7. The battery cell module of claim 6, wherein the heat conducting member is internally provided with a heat conducting medium, the heat conducting member has a flat plate structure, and the thickness of the heat conducting member is 6-8.5mm.
8. A battery pack comprising the cell module of any one of claims 1 to 7, the number of cell modules being plural.
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| CN115084762B (en) * | 2022-07-20 | 2024-03-22 | 天津市捷威动力工业有限公司 | Battery pack and electric automobile |
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| CN114400414A (en) | 2022-04-26 |
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