CN216054967U - Battery module - Google Patents
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- CN216054967U CN216054967U CN202121160400.0U CN202121160400U CN216054967U CN 216054967 U CN216054967 U CN 216054967U CN 202121160400 U CN202121160400 U CN 202121160400U CN 216054967 U CN216054967 U CN 216054967U
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- 238000001816 cooling Methods 0.000 claims abstract description 146
- 239000007788 liquid Substances 0.000 claims abstract description 124
- 239000011258 core-shell material Substances 0.000 claims abstract description 28
- 239000000110 cooling liquid Substances 0.000 claims abstract description 27
- 239000006223 plastic coating Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000004804 winding Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery module, which comprises a plurality of battery cores, a battery core shell and a liquid cooling plate, wherein the battery core shell is provided with a plurality of shell units which are arranged along the length direction and the height direction of the battery core shell; an insulating layer is arranged between the bottom end of each electric core and the liquid cooling plate, one side of the insulating layer is connected with the bottom end of the electric core, and the other side of the insulating layer is connected with the liquid cooling plate; the liquid cooling plate is internally provided with a cooling channel for circulating cooling liquid. The battery module structure is simplified, the size and the weight of the battery module are reduced, the quality and the volume conversion rate from the battery core to the battery module are improved, and the cooling or heating efficiency of the cooling liquid to the battery core is improved.
Description
Technical Field
The utility model belongs to the field of batteries, and particularly relates to a battery module.
Background
The energy density of the lithium ion battery pack is a key parameter influencing the endurance of the new energy automobile. The lithium ion battery pack is composed of a plurality of battery cells, and the grouping form of the battery cells directly influences the mass and volume conversion rate from the battery cells to the battery pack, and the latter is a key parameter influencing the energy density of the battery pack. The current battery core grouping form is mainly that after a plurality of battery cores are pre-grouped into modules, a battery pack is formed by a plurality of modules. Besides the battery core, the module also comprises parts such as a heat conduction assembly, a liquid cooling plate, a cover plate, a support, an end plate and the like.
In order to improve the energy density of the battery pack, various ways of simplifying the structural members in the battery pack are used, including grouping forms such as CTP or large modules, and the like, and the battery pack is particularly applied to blade batteries and the like. The battery pack has the advantages that the module layer is omitted, the battery pack is directly formed by the battery cell, the structural member in the battery pack is simplified, and the conversion rate from the battery cell to the whole pack is improved. The above-mentioned battery pack grouping form is based on the battery cell, however, the battery cell is not the minimum energy storage unit, and the battery cell has only winding with energy storage and energy conversion capabilities. Besides the winding, the electrolyte and the necessary electrical connections, the cell also comprises structural components such as a bottom insulating liner and a cell shell. The insulating gasket is used for isolating the winding from the bottom surface of the cell shell; the cell shell is used for restraining winding and isolating the winding from the external environment.
Winding is a key part of the battery core and is also the object of thermal management control. In the liquid-cooled battery pack, the electric core is cooled or heated by the cooling liquid through the liquid-cooled plate, and the electric core is connected with the liquid-cooled plate through heat conducting parts such as a heat conducting pad or heat conducting glue. Therefore, the winding and the cooling liquid generally include an insulating gasket, a bottom surface of the cell casing, a heat conducting component and a liquid cooling plate, wherein the liquid cooling plate is used for restraining the cooling liquid and isolating the cooling liquid from the external environment.
In the liquid cooling battery package module structure, the isolation effect of the electric core shell body on the electric core is partially overlapped with the isolation effect of the liquid cooling plate on the cooling liquid, so that the group conversion rate of the electric core is reduced. Meanwhile, a plurality of parts between the battery core and the cooling liquid increase the heat conduction resistance and the contact resistance between the battery core and the cooling liquid, and reduce the cooling or heating efficiency. In addition, the arrangement of the heat conducting parts between the battery core and the liquid cooling plate is difficult to be accurately and uniformly controlled, so that the area and the thickness of a heat conducting structure have the characteristic of large inconsistent distribution, and the inconsistency of the distribution of the heat conducting structure can increase the nonuniformity of the temperature distribution of the whole module battery core.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that in the prior art, the isolation effect of a battery core shell on a battery core is partially overlapped with the isolation effect of a liquid cooling plate on cooling liquid, the grouped conversion rate of the battery core is reduced, and meanwhile, the cooling or heating efficiency of the cooling liquid on the battery core is reduced due to the multilayer structure between the battery core and the cooling liquid. The utility model provides a battery module, which reduces the multilayer structure from a battery core to cooling liquid, and can improve the grouping conversion rate of the battery core and the cooling or heating efficiency of the cooling liquid to the battery core.
In order to solve the technical problem, the embodiment of the utility model discloses a battery module, which comprises a plurality of battery cores, a battery core shell and a liquid cooling plate, wherein the battery core shell is provided with a plurality of shell units which are arranged along the length direction and the height direction of the battery core shell; an insulating layer is arranged between the bottom end of each electric core and the liquid cooling plate, one side of the insulating layer is connected with the bottom end of the electric core, and the other side of the insulating layer is connected with the liquid cooling plate; the liquid cooling plate is internally provided with a cooling channel for circulating cooling liquid.
Adopt above-mentioned technical scheme, through being formed with electric core casing along a plurality of housing unit of electric core casing's length direction and direction of height range, electric core casing sets up in one side of liquid cooling board, each housing unit and liquid cooling board surround the chamber that holds that forms and hold at least one electric core, and the liquid cooling board forms the chamber that holds along electric core casing's width direction's wherein one end, the bottom of electric core is located the one end wherein that holds the chamber, make the shell structure and the heat conduction structure spare that have reduced the electric core bottom between electric core to the liquid cooling board like this, can simplify battery module structure, reduce battery module size and weight, improve quality and the volume conversion rate of electric core to battery module. Meanwhile, an insulating layer is arranged between the bottom end of each electric core and the liquid cooling plate, one side of the insulating layer is connected with the bottom end of the electric core, and the other side of the insulating layer is connected with the liquid cooling plate; the liquid cooling plate is internally provided with a cooling channel for circulating cooling liquid, and only an insulating layer is arranged between the liquid cooling plate and the battery core, so that the cooling or heating efficiency of the cooling liquid on the battery core can be improved.
According to another specific embodiment of the present invention, the battery module disclosed in the embodiment of the present invention includes at least two cell casings, and two adjacent cell casings are respectively disposed on two sides of the liquid cooling plate.
By adopting the technical scheme, two adjacent battery cell shells are respectively arranged on two sides of the liquid cooling plate, namely the two adjacent battery cell shells share the liquid cooling plate, so that the shell structure and the heat conducting structural member of the bottom end of the battery cell are reduced from the battery cell to the liquid cooling plate, the structure of the battery module can be simplified, the size and the weight of the battery module are reduced, and the quality and the volume conversion rate from the battery cell to the battery module are improved.
According to another specific embodiment of the present invention, in the battery module disclosed in the embodiment of the present invention, the cooling channel includes a plurality of branch channels independently disposed at intervals along the width direction of the liquid cooling plate, and each branch channel extends along the length direction of the liquid cooling plate; wherein, the width direction of liquid cooling plate is parallel with the direction of height of electricity core casing.
Adopt above-mentioned technical scheme, cooling channel includes many branch passageways that the width direction interval along the liquid cold drawing independently set up, and the coolant liquid circulates in many branch passageways and can improve the cooling or the heating efficiency of coolant liquid to electric core.
According to another specific embodiment of the present invention, in the battery module disclosed in the embodiment of the present invention, the cell casing and the liquid cooling plate are integrally injection-molded.
By adopting the technical scheme, the integrated injection molding of the electric core shell and the liquid cooling plate can ensure that the electric core shell is in sealing connection with the liquid cooling plate, and the thickness of the electric core shell is uniform, and the thickness of the liquid cooling plate is uniform, so that the cooling or heating of the electric core by the cooling liquid in the liquid cooling plate is more uniform, and the uniformity of the temperature distribution of the electric core is ensured.
According to another specific embodiment of the present invention, in the battery module disclosed in the embodiment of the present invention, the cell casing is formed by press molding, and one end of the cell casing and the liquid cooling plate are formed by plastic coating.
By adopting the technical scheme, after the battery core shell is subjected to size stamping forming as required, the liquid cooling plate with a proper size is selected, and the opening of the molded battery core shell is wrapped and molded with the liquid cooling plate at one end, so that the battery core shell is in sealing connection with the liquid cooling plate, and when battery modules with various specifications are required to be processed, the liquid cooling plate and the battery core shell adopt a split molding processing mode to improve the processing efficiency.
According to another embodiment of the present invention, a battery module is disclosed in which an insulating layer is provided on an inner peripheral side of each housing unit.
By adopting the technical scheme, the insulating layer is arranged on the inner peripheral side of each shell unit, the insulating layer is arranged between the bottom end of each battery cell and the liquid cooling plate, the battery cell can be prevented from discharging to cause the electrification of the battery cell shell, and therefore the safety of the battery module is ensured.
According to another specific embodiment of the present invention, the battery module further includes a top plate connected to a side of the cell casing away from the liquid cooling plate.
By adopting the technical scheme, the top plate is connected to one side, away from the liquid cooling plate, of the battery core shell, so that the battery core shell, the liquid cooling plate and the top plate can form a closed accommodating space for accommodating the battery core, and the normal work of the battery module is ensured.
According to another specific embodiment of the present invention, in the battery module disclosed in the embodiment of the present invention, the battery cell is a winding battery cell.
By adopting the technical scheme, the battery cell adopts a winding battery cell which is only provided with one positive electrode and one negative electrode, the structure is simple, and the energy of the battery formed by the winding battery cell is large.
The utility model has the beneficial effects that:
the utility model provides a battery module, wherein a plurality of shell units which are arranged along the length direction and the height direction of a battery core shell are formed on the battery core shell, the battery core shell is arranged on one side of a liquid cooling plate, a containing cavity containing at least one battery core is formed by surrounding each shell unit and the liquid cooling plate, the liquid cooling plate forms one end of the containing cavity along the width direction of the battery core shell, and the bottom end of the battery core is positioned at one end of the containing cavity.
In addition, an insulating layer is arranged between the bottom end of each electric core and the liquid cooling plate, one side of the insulating layer is connected with the bottom end of the electric core, and the other side of the insulating layer is connected with the liquid cooling plate; the liquid cooling plate is internally provided with a cooling channel for circulating cooling liquid, and only an insulating layer is arranged between the liquid cooling plate and the battery core, so that the cooling or heating efficiency of the cooling liquid on the battery core can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a battery module according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cell casing of the battery module in the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery module according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cell casing and a liquid cooling plate of a first embodiment of a battery module in an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a first embodiment of a battery module according to an example of the present invention;
FIG. 6 is an enlarged schematic view of portion A of FIG. 5;
fig. 7 is a schematic perspective view illustrating a liquid cooling plate of a battery module according to an embodiment of the utility model;
fig. 8 is a front view schematically illustrating a liquid cooling plate of a battery module according to an embodiment of the present invention, in which cross-sectional positions are marked;
fig. 9 is a structural view of a cross-section taken along line B-B in fig. 8.
Description of reference numerals:
100: an electric core;
200: a cell shell; 210: a housing unit;
300: a liquid-cooled plate; 310: a cooling channel; 311: a branch channel;
400: an insulating layer;
l1: the length direction of the battery cell shell;
h1: the height direction of the battery cell shell;
w1: the width direction of the battery cell shell;
l2: the length direction of the liquid cooling plate;
w2: width direction of the liquid cooling plate.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the utility model will be described in conjunction with the preferred embodiments, it is not intended that the features of the utility model be limited to these embodiments. On the contrary, the intention of the novel description to be incorporated into the embodiments is to cover alternatives or modifications which may be extended in accordance with the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The utility model may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are only used for convenience in describing and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A battery module according to an embodiment of the present invention will be described below with reference to fig. 1 to 9. As shown in fig. 1, the present invention provides a battery module, which includes a plurality of battery cells 100, a battery cell casing 200, and a liquid cooling plate 300. The battery cell 100 may be a battery cell 100 made of stacked sheets, or a battery cell 100 formed by winding. The battery cell 100 refers to an incompletely sealed assembly including at least a positive electrode tab, a negative electrode tab, and an electrolyte. In one embodiment, the battery cell 100 is a winding battery cell, that is, a battery cell 100 formed by winding.
As shown in fig. 2, the cell casing 200 is formed with a plurality of casing units 210 arranged in the cell casing length direction L1 and the cell casing height direction H1. In the present embodiment, the length direction L1 of the cell casing is a direction from the left side to the right side of the cell casing 200 as shown in fig. 2, and the height direction H1 of the cell casing is a direction from the bottom side to the top side of the cell casing 200, i.e., a vertical direction as shown in fig. 2. The number of housing units 210 may be two, three, or even more. The housing unit 210 has a rectangular parallelepiped shape with both ends open. Each housing unit 210 includes four sidewalls, and two adjacent housing units 210 may share one sidewall as shown in fig. 2, or four sidewalls of each housing unit 210 may be separately disposed, and those skilled in the art can set the sidewalls according to actual needs and specific situations. The plurality of case units 210 may be arranged in the length direction L1 of the cell case and the height direction H1 of the cell case to form a plurality of different sizes of cell cases 200, so as to form different sizes of battery modules, such as the battery module shown in fig. 1, or such as the battery module shown in fig. 3. The number and arrangement of the housing units 210 can be set by those skilled in the art according to actual needs and specific situations, and the present embodiment is not limited to this.
As shown in fig. 4, the cell casing 200 is disposed on one side of the liquid cooling plate 300, the cell casing 200 is fixedly connected to the liquid cooling plate 300 in a sealing manner, each casing unit 210 and the liquid cooling plate 300 surround to form a containing cavity for containing at least one battery cell 100 (see fig. 1), and the liquid cooling plate 300 forms one end of the containing cavity along the width direction W1 of the cell casing, that is, one open end of the casing unit 210 is closed. As shown in fig. 5, the bottom end of the battery cell 100 is located at one end of the accommodating cavity, where the bottom end of the battery cell 100 is an end of the battery cell 100 away from the positive and negative electrode plates, that is, an end away from the liquid-cooled plate 300 shown in fig. 5. In the present embodiment, as shown in fig. 4, a containing cavity formed by each housing unit 210 and the liquid cooling plate 300 can contain one battery cell 100 (see fig. 1), and can also contain two or more battery cells 100, which is not limited in this embodiment. The size of the housing unit 210 needs to be set according to the size of the battery cells 100 to ensure that each accommodating cavity can accommodate at least one battery cell 100, the number of the housing units 210 needs to be set according to the number of the battery cells 100 in the battery module, and the size of the liquid cooling plate 300 needs to be set according to the size, the number and the arrangement mode of the housing units 210. The width direction W1 of the cell casing is the direction from the front end to the rear end of the accommodation chamber shown in fig. 4.
As shown in fig. 6, an insulating layer 400 is disposed between the bottom end of each battery cell 100 and the liquid cooling plate 300, one side of the insulating layer 400 is connected to the bottom end of the battery cell 100, and the other side of the insulating layer 400 is connected to the liquid cooling plate 300. In this embodiment, the insulating layer 400 is a temperature-resistant insulating layer, which may be a temperature-resistant insulating film or a temperature-resistant insulating paint, and if the insulating layer is a temperature-resistant insulating film, the temperature-resistant insulating film may be bonded to the liquid cooling plate 300.
As shown in fig. 6, the liquid cooling plate 300 is provided therein with a cooling passage 310 for circulating a cooling liquid. In the present embodiment, the cooling channel 310 may extend along the length direction L2 (see fig. 7) of the liquid cooling plate, or may extend along the width direction W2 (see fig. 7) of the liquid cooling plate, and the cooling channel 310 may extend in a straight line, a broken line, or a curved line, and those skilled in the art may set the cooling channel according to actual needs and specific situations. In the present embodiment, the longitudinal direction L2 of the liquid cooling plate is parallel to the longitudinal direction L1 of the cell casing, and the width direction W2 of the liquid cooling plate is parallel to the height direction H1 of the cell casing.
Fig. 7 and 8 are schematic structural views of a liquid cooling plate in the battery module provided in this embodiment. In one embodiment, as shown in fig. 9, the cooling passage 310 includes a plurality of branch passages 311 independently provided at intervals in the width direction W2 of the liquid-cooled panel. In the present embodiment, the branch channel 311 may be provided as one, two, three or more, and those skilled in the art can set the branch channel according to actual needs and specific situations, and the present embodiment does not specifically limit this. Each branch passage 311 extends in the longitudinal direction L2 of the liquid-cooled panel; the width direction W2 of the liquid cooling plate is parallel to the height direction H1 of the cell casing. In the present embodiment, the intervals between the two adjacent branch passages 311 in the width direction W2 of the liquid cooling plate may be equal or different as shown in fig. 6, and the present embodiment does not specifically limit this. With the above scheme, the cooling liquid flows through the plurality of branch channels 311, so that the cooling or heating efficiency of the battery cell 100 by the cooling liquid can be improved.
In one embodiment, as shown in fig. 1, the battery module includes at least two cell housings 200, and two adjacent cell housings 200 are respectively disposed on two sides of the liquid cooling plate 300. Two adjacent electric core casings 200 share a liquid cooling plate 300, make electric core 100 to have reduced the shell structure and the heat conduction structure of electric core 100 bottom between the liquid cooling plate 300 like this, can simplify battery module structure, reduce battery module size and weight, improve quality and the volume conversion rate of electric core 100 to the battery module.
In one embodiment, an insulating layer 400 (not shown) is disposed on the inner peripheral side of each housing unit 210. In the present embodiment, the battery cell 100 is an incompletely sealed component, and at least includes a positive electrode tab, a negative electrode tab and an electrolyte, in order to prevent the battery cell 100 from discharging to cause the cell casing 200 to be charged, an insulating layer 400 needs to be disposed on the inner circumferential side of each casing unit 210, and the insulating layer 400 may specifically be a temperature-resistant insulating layer. In this embodiment, the temperature-resistant insulating layer may be a temperature-resistant insulating film or a temperature-resistant insulating varnish, and if the temperature-resistant insulating film is a temperature-resistant insulating film, the insulating film may be bonded to each inner circumferential side of each housing unit 210.
In one embodiment, the cell casing 200 and the liquid cooling plate 300 are integrally injection molded. The materials of the cell casing 200 and the liquid cooling plate 300 are preferably plastic materials with high strength and good thermal conductivity. By adopting the above technical scheme, the battery core shell 200 and the liquid cooling plate 300 can be hermetically connected, the thickness of the battery core shell 200 is ensured to be uniform, and the thickness of the liquid cooling plate 300 is ensured to be uniform, so that the cooling or heating of the battery core 100 by the cooling liquid in the liquid cooling plate 300 is more uniform, and the uniformity of the temperature distribution of the battery core 100 is ensured.
In one specific embodiment, the cell casing 200 is formed by punching, and one end of the cell casing 200 in the width direction W1 of the cell casing is formed by plastic-coating with the liquid cooling plate 200, that is, one end of the opening of the cell casing 200 is formed by plastic-coating with the liquid cooling plate 300. In this embodiment, after the battery cell casing 200 is punched and formed according to the required size, the liquid cooling plate 300 is processed according to the size of the battery cell casing 200, the processing method includes but is not limited to injection molding, punch forming and the like, the material of the liquid cooling plate 300 is preferably made of a plastic material with higher thermal conductivity, one end of the opening of the battery cell casing 200 after forming is wrapped with the liquid cooling plate 300 for plastic molding, so that the battery cell casing 200 and the liquid cooling plate 300 are connected in a sealing manner, and when battery modules with various specifications are required to be processed, the liquid cooling plate 300 and the battery cell casing 200 can improve the processing efficiency by adopting a split molding processing method.
In one embodiment, the battery module further includes a top plate (not shown) connected to a side of the cell casing 200 away from the liquid cooling plate 300. In this embodiment, the battery cell casing 200 and the liquid cooling plate 300 are formed by integral injection molding or each casing unit 210 is formed by a split structure, after one end of the plurality of casing units 210 is formed by plastic coating with the liquid cooling plate 300, the battery cell 100 at least comprising a positive plate, a negative plate and electrolyte is placed in the accommodating cavity formed by the casing unit 210 and the liquid cooling plate 300, and then the top plate is connected to one side of the battery cell casing 200 far away from the liquid cooling plate 300, so that the battery cell casing 200, the liquid cooling plate 300 and the top plate form a plurality of closed accommodating cavities for accommodating the battery cell 100, and the normal operation of the battery module is ensured. It should be noted that the insulating layer 300 is also required to be disposed on the side of the top plate close to the battery cell 100, and insulating paint may be applied to the side of the top plate close to the battery cell 100 or an insulating film may be adhered to the side of the top plate close to the battery cell 100. The one end fixed connection that liquid cooling board 300 is kept away from to roof and electric core casing 200 seals, specifically can be for roof and electric core casing 200 keep away from the one end package plastic-molded of liquid cooling board 300, the material preference intensity of roof is higher and the higher plastic material of heat conductivity.
The utility model provides a battery module, a plurality of shell units 210 arranged along the length direction L1 of a battery cell shell and the height direction H1 of the battery cell shell are formed on the battery cell shell 200, the battery cell shell 200 is arranged on one side of a liquid cooling plate 300, each shell unit 210 and the liquid cooling plate 300 surround to form a containing cavity containing at least one battery cell 100, the liquid cooling plate 300 forms one end of the containing cavity along the width direction W1 of the battery cell shell, the bottom end of the battery cell 100 is positioned at one end of the containing cavity, so that the shell structure and the heat conduction structural member at the bottom end of the battery cell 100 are reduced between the battery cell 100 and the liquid cooling plate 300, the structure of the battery module can be simplified, the size and the weight of the battery module are reduced, and the quality and the volume conversion rate of the battery cell 100 to the battery module are improved. Since the size difference of each battery module in the market is large, the practical technical effect of the utility model needs to be estimated according to the specifications of the commonly used battery modules. The thickness of the bottom surface of the commonly used battery cell shell 200 is about 2-3 mm, and the thickness of the heat conducting parts is about 0.5-2 mm, so that the height of the battery module on one side of the liquid cooling plate 300 in the technical scheme provided by the utility model can be reduced by 2.5-5 mm. Because the height of the battery module on one side of the liquid cooling plate 300 is generally within the range of 100-200 mm, the technical scheme provided by the aspect can reduce the height of the battery module by 1% -5%. The mass of the heat conducting parts accounts for 0.5-1% of the mass of the battery module, and the mass of the bottom of the battery cell shell 200 accounts for 1-2% of the mass of the battery module, so that the mass of the battery module can be reduced by 1.5-3% by the technical scheme provided by the utility model.
In addition, an insulating layer 400 is arranged between the bottom end of each electric core 100 and the liquid cooling plate 300, one side of the insulating layer 400 is connected with the bottom end of the electric core 100, and the other side of the insulating layer 400 is connected with the liquid cooling plate 300; the liquid cooling plate 300 is provided with a cooling channel 310 inside for circulating a cooling liquid, so that only the insulating layer 400 is arranged between the liquid cooling plate 300 and the battery cell 100, and the cooling or heating efficiency of the cooling liquid on the battery cell 100 can be improved.
While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the utility model, taken in conjunction with the specific embodiments thereof, and that no limitation of the utility model is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the utility model.
Claims (8)
1. A battery module comprises a plurality of battery cores, a battery core shell and a liquid cooling plate, and is characterized in that the battery core shell is provided with a plurality of shell units which are arranged along the length direction and the height direction of the battery core shell, the battery core shell is arranged on one side of the liquid cooling plate, each shell unit and the liquid cooling plate surround to form a containing cavity containing at least one battery core, the liquid cooling plate forms one end of the containing cavity along the width direction of the battery core shell, and the bottom end of the battery core is positioned at one end of the containing cavity; wherein,
an insulating layer is arranged between the bottom end of each electric core and the liquid cooling plate, one side of the insulating layer is connected with the bottom end of the electric core, and the other side of the insulating layer is connected with the liquid cooling plate;
and a cooling channel is arranged in the liquid cooling plate and used for circulating cooling liquid.
2. The battery module of claim 1, wherein the battery module comprises at least two cell shells, and two adjacent cell shells are respectively disposed on two sides of the liquid cooling plate.
3. The battery module according to claim 2, wherein the cooling channel comprises a plurality of branch channels independently arranged at intervals in a width direction of the liquid cooling plate, and each branch channel extends in a length direction of the liquid cooling plate; the width direction of the liquid cooling plate is parallel to the height direction of the battery cell shell.
4. The battery module of claim 2, wherein the cell casing and the liquid cooling plate are integrally injection molded.
5. The battery module of claim 2, wherein the cell casing is formed by stamping, and one end of the cell casing is formed by plastic-coating with the liquid cooling plate.
6. The battery module according to claim 5, wherein the insulating layer is provided on an inner peripheral side of each of the housing units.
7. The battery module of claim 6, further comprising a top plate coupled to a side of the cell casing away from the liquid cooled plate.
8. The battery module of any of claims 1-7, wherein the cells are wound cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121160400.0U CN216054967U (en) | 2021-05-27 | 2021-05-27 | Battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121160400.0U CN216054967U (en) | 2021-05-27 | 2021-05-27 | Battery module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023173721A1 (en) * | 2022-03-18 | 2023-09-21 | 宁德时代新能源科技股份有限公司 | Battery cell, battery module, battery, and power-consuming apparatus |
| CN118249002A (en) * | 2024-05-29 | 2024-06-25 | 天津力神新能源科技有限公司 | Energy storage device |
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2021
- 2021-05-27 CN CN202121160400.0U patent/CN216054967U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023173721A1 (en) * | 2022-03-18 | 2023-09-21 | 宁德时代新能源科技股份有限公司 | Battery cell, battery module, battery, and power-consuming apparatus |
| CN118249002A (en) * | 2024-05-29 | 2024-06-25 | 天津力神新能源科技有限公司 | Energy storage device |
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