Battery cell module, battery pack and vehicle

Abstract

The invention discloses a battery cell module, a battery pack and a vehicle. The cell module comprises a shell, a plurality of roll cores and a plurality of conducting bars. The shell is provided with a plurality of containing grooves, the roll cores are arranged in the containing grooves in a one-to-one correspondence mode, every two adjacent roll cores are electrically connected through a conducting bar, and the whole cell module serves as a battery unit to be electrically connected with the outside. And the cooling flow channel is arranged in the shell and can directly exchange heat with the roll core in the accommodating groove, so that the cooling efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of battery packs, and in particular relates to a battery cell module, a battery pack, and a vehicle. Background Art

[0002] As vehicles evolve, electric vehicles (including both electric and electric vehicles) are becoming increasingly popular. Battery packs provide the electrical energy for electric vehicles, and their performance impacts the overall performance of the vehicle. Battery packs generate heat during both charging and powering, necessitating cooling of the battery cells.

[0003] Currently, there are three types of cooling methods for battery cells: single-sided cooling, double-sided cooling, and three-dimensional cooling. Single-sided cooling generally involves cooling on the bottom surface; double-sided cooling generally involves cooling on both the top and bottom surfaces; and three-dimensional cooling involves cooling on the sides of the battery cell.

[0004] Despite the many cooling methods mentioned above, there is still room for further improvement in the cooling efficiency of the battery pack. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery cell module, a battery pack, and a vehicle with higher cooling efficiency, small size, and light weight.

[0006] In a first aspect of the present application, a battery cell module is provided, comprising:

[0007] The shell is provided with a plurality of receiving slots; the shell is provided with a cooling flow channel;

[0008] A plurality of winding cores and a plurality of conductive bars, wherein the winding cores are arranged in a plurality of accommodating cavities of the shell in a one-to-one correspondence to exchange heat with the cooling channels of the shell; and two adjacent winding cores are electrically connected through the conductive bars.

[0009] In some embodiments, a heat conducting member is provided between the conductive bar and the housing, and the conductive bar and the housing exchange heat through the heat conducting member.

[0010] In some embodiments, the shell includes an outer shell and a plurality of partitions; the plurality of partitions are arranged in an inner cavity of the outer shell at intervals and connected to the outer shell to divide the inner cavity of the outer shell into a plurality of the receiving slots.

[0011] In some embodiments, the cooling channel is provided in the housing and / or the partition.

[0012] In some embodiments, the cooling channel is provided in each of the partitions; and the heat conducting member is provided between the conductive bar and the partition.

[0013] In some embodiments, the cooling channel includes a main liquid inlet channel, a main liquid outlet channel and a plurality of branch channels; the main liquid inlet channel and the main liquid outlet channel are respectively arranged on opposite side walls of the shell; and the branch channels are arranged in the partition.

[0014] In some embodiments, the heat conducting member is an insulating thermally conductive adhesive; the insulating thermally conductive adhesive seals the gap between the housing and the conductive bar.

[0015] In some embodiments, the battery cell module further includes: an insulating plate connected to the shell and covering the notch of the accommodating slot to enclose and form a number of independent and sealed accommodating cavities; a number of the winding cores are arranged in a one-to-one correspondence in the number of the accommodating cavities.

[0016] In some embodiments, a plurality of weak areas are provided on the insulating plate at positions corresponding to the respective receiving slots; and the melting point of the insulating plate is greater than the temperature of the thermal runaway airflow of the winding core.

[0017] In some embodiments, the battery module further includes: a top cover connected to the shell and having a gap between it and the insulating plate; and one or more explosion-proof valves are provided on the top cover.

[0018] In some embodiments, the core includes: an insulating sleeve; a core body, which is arranged in the insulating sleeve, and the core body includes a positive electrode sheet, a negative electrode sheet and a separator for separating the positive electrode sheet from the negative electrode sheet; an electrolyte, which is arranged in the insulating sleeve and infiltrates the core body.

[0019] In a second aspect of the present application, a battery pack is provided, characterized in that it includes a box and one or more battery cell modules according to the first aspect; the battery cell modules are installed in the box.

[0020] In some embodiments, the battery pack is provided with more than two temperature regulation units; the temperature regulation unit includes more than one battery cell module, and the cooling channels of the battery cell modules located in the same temperature regulation unit are connected; the cooling channels of each temperature regulation unit are independent of each other.

[0021] In a third aspect of the present application, a vehicle is provided, comprising a vehicle body, a temperature control system and one or more battery packs according to the second aspect; the battery pack and the temperature control system are respectively mounted on the vehicle body; and the coolant in the cooling channel of the battery pack exchanges heat with the temperature control system.

[0022] In some embodiments, the number of the temperature control systems is the same as the number of the temperature regulating units of the battery pack; the coolant in the cooling channel of each of the temperature regulating units of the battery pack is heat-exchanged with the corresponding temperature control system.

[0023] According to one or more embodiments of the present application, a battery cell module is provided, comprising a housing, a plurality of winding cores, and a plurality of conductive bars. The housing is provided with a plurality of receiving slots, wherein the plurality of winding cores are arranged in a one-to-one correspondence in the plurality of receiving slots, and two adjacent winding cores are electrically connected via the conductive bars. The entire battery cell module functions as a battery unit and is electrically connected to the outside world. A cooling channel is provided in the housing, which can directly exchange heat with the winding cores in the receiving slots, thereby improving cooling efficiency.

[0024] The battery cell module provided by one or more embodiments of the present application integrates multiple cores into a single battery unit, resulting in a compact structure and high volumetric power density. By incorporating cooling channels into the housing, the independent liquid cooling plate is eliminated, reducing the size and weight of the battery cell module. Furthermore, the cooling channels directly exchange heat with the cores, eliminating the need for heat to pass through the housing of the battery cell, as in related art, resulting in higher cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic structural diagram of a battery cell module in one or more embodiments of the present application is shown.

[0027] Figure 2 Shown Figure 1 Top view of the battery cell module after removing the top cover and insulation plate.

[0028] Figure 3 Shown Figure 1 Schematic diagram of the structure of the conductive bar installation location of the battery cell module.

[0029] Figure 4 A schematic structural diagram of the cooling channel of the battery cell module in one or more embodiments of the present application is shown.

[0030] Figure 5 A schematic structural diagram of an insulating plate of a battery cell module in one or more embodiments of the present application is shown.

[0031] Figure 6 A schematic structural diagram of a top cover of a battery cell module in one or more embodiments of the present application is shown.

[0032] Figure 7 An exploded view of a rolled core of a battery cell module in one or more embodiments of the present application is shown.

[0033] Figure 8 Shown Figure 7 A cross-sectional view of the core body of the core.

[0034] Figure 9 Shows the structure of the battery pack in one or more embodiments of the present application Figure 1 .

[0035] Figure 10 Shows the structure of the battery pack in one or more embodiments of the present application Figure 2 .

[0036] Figure 11 Shows the structure of the battery pack in one or more embodiments of the present application Figure 3 .

[0037] Figure 12 A schematic structural diagram of a vehicle in one or more embodiments of the present application is shown.

[0038] Explanation of the reference numerals: 10-cell module, 10a-accommodation cavity, 10b-flue; 11-shell, 111-housing, 112-partition, 11a-accommodation groove, 113-cooling channel, 1131-liquid inlet main channel, 1132-liquid outlet main channel, 1133-branch channel; 12-insulating plate, 121-weak area; 13-winding core, 131-insulating sleeve, 132-winding core body, 1321-ear , 1322-positive electrode sheet, 1323-negative electrode sheet, 1324-diaphragm; 14-conductive bar, 141-positive electrode column, 142-negative electrode column; 15-top cover; 16-explosion-proof valve; 17-heat conducting part; 20-box; 30-pipeline; 100-battery pack; 200-car body; 300-temperature control system, 310-water tank, 320-water pump, 330-radiator, 340-fan; 1000-vehicle. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0040] In addition, this application may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0041] In the related art, there are generally three types of cells used in battery packs: square shell cells, cylindrical cells and soft-pack cells. Both square shell cells and cylindrical cells adopt the structure of internal coil core + electrolyte and external shell, and the outer shell of square shell cells and cylindrical cells are provided with positive pole, negative pole and explosion-proof valve. When in use, square shell cells or cylindrical cells are generally arranged in an array of several square shell cells or cylindrical cells, and the liquid cooling plate is arranged above, below or between the square shell cells or cylindrical cells, and the coil core is cooled by heat exchange between the outer shell of the cell and the liquid cooling plate. When in use, soft-pack cells are generally grouped into several soft-pack cells and installed in the outer shell of the soft-pack cell module. Several soft-pack cells are electrically connected through a collector bar. The liquid cooling plate is arranged above, below or between the soft-pack cell module, and the soft-pack cell is cooled by heat exchange between the outer shell of the soft-pack cell module and the liquid cooling plate.

[0042] In related technologies, regardless of the battery cell structure or cooling method, liquid cooling plates cannot directly cool the internal windings of the battery cells. Heat from the battery cells is transferred from the windings to the outer casing (via thermally conductive adhesive) and then to the liquid cooling plate, resulting in a long heat transfer path and low cooling efficiency.

[0043] To this end, one or more embodiments of the present application provide a battery cell module, a battery pack, and a vehicle. By integrating the battery cell housing and the liquid cooling plate, the thermal conductive glue and the independent battery cell housing and liquid cooling plate are eliminated, the heat conduction path is shortened, the heat transfer efficiency is improved, the cooling efficiency is higher, and the battery cell housing and the liquid cooling plate are smaller and lighter.

[0044] The specific technical solutions of the present application are described in detail below with reference to the accompanying drawings, which are not necessarily drawn to scale. Similar or identical reference numerals may be used to designate the same or similar parts in different figures. The use of similar or identical reference numerals in different figures does not imply that all figures including similar or identical reference numerals constitute a single or identical embodiment. The accompanying drawings generally illustrate various embodiments discussed in this application by way of example and not limitation.

[0045] See also Figure 1 and Figure 2 In the first embodiment of the present application, a battery cell module 10 is provided, comprising a shell 11, a plurality of winding cores 13, and a plurality of conductive bars 14. The shell 11 is provided with a plurality of independent receiving slots 11a, and the plurality of winding cores 13 are arranged in a one-to-one correspondence in the plurality of receiving slots 11a. Each winding core 13 is encapsulated in an independent receiving slot 11a, and two adjacent winding cores 13 are electrically connected through the conductive bar 14. By integrating the plurality of winding cores 13 into a battery unit, the entire battery cell module 10 is electrically connected to the outside world as a battery unit, so that the battery cell module 10 provided in one or more embodiments of the present application has a more compact structure and a high energy density.

[0046] The shell 11 is provided with a cooling channel 113, which is arranged in the shell wall of the shell 11. Since each core 13 is arranged in a corresponding receiving slot 11a, each core 13 can directly contact the shell wall of the shell 11, thereby achieving heat exchange. By arranging the cooling channel 113 in the shell 11, on the one hand, the independent liquid cooling plate is eliminated, the volume and weight of the battery module 10 are reduced, and the energy density is improved. On the other hand, the cooling channel 113 directly exchanges heat with the core 13, and the heat does not need to pass through the shell 111 of the battery cell in the related art. The heat transfer path is shorter, and the cooling efficiency is higher.

[0047] The cores 13 are electrically connected through the conductive bar 14, specifically, the conductive bar 14 is electrically connected to the tab 1321 of the core 13. Two adjacent cores 13 are electrically connected through the conductive bar 14, and the electrical connection between the cores 13 can be in series or in parallel, which is not limited in this application. In some embodiments, the cores 13 are connected in series through the conductive bar 14 and are respectively connected to the positive electrode 141 and the negative electrode 142 of the battery module 10 to form an integrated high-voltage battery module 10. The positive electrode 141 and the negative electrode 142 are both arranged on the shell 11 and exposed to the outside.

[0048] In some embodiments, the positive electrode column 141 and the negative electrode column 142 can be integrally formed with the conductive bar 14, that is, the outermost two conductive bars 14 extend out of the shell 11 to form the positive electrode column 141 and the negative electrode column 142, respectively. Figure 2 shown.

[0049] During the charging and discharging process of the battery module 10, not only the winding core 13 generates heat, but also the conductive bar 14 generates heat. Figure 3 In some embodiments, a heat conductor 17 is provided between the conductive bar 14 and the housing 11, and heat is exchanged between the conductive bar 14 and the housing 11 via the heat conductor 17. In other words, the cooling channel 113 within the housing 11 not only directly cools the winding core 13, but also cools the conductive bar 14, effectively reducing heat accumulation at the tabs 1321 of the winding core 13.

[0050] See also Figure 2 , shows a schematic structural diagram of the housing 11 in certain embodiments. The housing 11 includes an outer shell 111 and a plurality of partitions 112. The partitions 112 are spaced apart within the inner cavity of the outer shell 111 and connected to the outer shell 111 to divide the inner cavity of the outer shell 111 into a plurality of receiving slots 11a. The partitions 112 and the outer shell 111 can be fixedly connected by welding, bonding, or other methods. In certain embodiments, the partitions 112 and the outer shell 111 can be integrally formed, for example, by casting an aluminum alloy. To ensure the overall structural strength of the battery cell module 10, in certain embodiments, the wall thickness of the outer shell 111 can be no less than that of the partitions 112.

[0051] The outer shell 111 and the partition 112 are both in direct contact with the core 13 , so the cooling channel 113 can be set in the outer shell 111 and / or the partition 112 , and this application does not impose any limitation.

[0052] In some embodiments, each partition 112 is provided with a cooling channel 113, and the partition 112 acts as a liquid cooling plate. That is, the cooling channel 113 can be provided only in each partition 112, or can be provided in both the housing 111 and each partition 112. The heat conductor 17 is provided between the conductive bar 14 and the partition 112 to conduct the heat of the conductive bar 14 to the partition 112. Since the conductive bar 14 is connected to different winding cores 13, the conductive bar 14 will cross different receiving slots 11a, approaching the partition 112 or directly contacting the partition 112. The heat transfer path from the partition 112 to the conductive bar 14 is short, and the heat exchange efficiency is high.

[0053] The thermal conductor 17 can be made of any material with good thermal conductivity, such as metal (copper, aluminum, silver, etc.), non-metal (such as graphite, silicon carbide, etc.) or certain composite materials (such as polymer-based composite materials, with polyimide, epoxy resin and other polymers as the matrix, and added with metal powder, graphene and other thermal conductive fillers), and this application does not impose any restrictions.

[0054] Since the conductive bar 14 spans across different receiving slots 11a, it is necessary to ensure that the receiving slots 11a are sealed at the conductive bar 14. In some embodiments, a through hole can be provided in the partition 112, and the conductive bar 14 passes through the through hole and has an interference fit with the through hole, thereby achieving sealing.

[0055] In other embodiments, the heat conducting member 17 is made of insulating thermally conductive adhesive, which wraps around the conductive bar 14 to provide insulation. The insulating thermally conductive adhesive can not only conduct heat but also seal the gaps between the housing 11, the insulating plate 12, and the conductive bar 14. The insulating thermally conductive adhesive can be the thermally conductive structural adhesive applied between the battery cells and the liquid cooling plate in the battery pack 100 of related art, such as a composite material with epoxy resin as the matrix and boron nitride as the thermally conductive filler. The specific material of the insulating thermally conductive adhesive is not limited in this application.

[0056] See also Figure 1 In some embodiments, the cell module 10 further includes an insulating plate 12 , which is connected to the housing 11 and covers the notch of the receiving slot 11a . Together, the insulating plate 12 and the housing 11 form a plurality of independent and sealed receiving chambers 10a . A plurality of winding cores 13 are disposed in a one-to-one correspondence within the receiving chambers 10a , with each winding core 13 enclosed in an independent receiving chamber 10a . These receiving chambers 10a ensure spatial isolation between the winding cores 13 , preventing the spread of thermal runaway smoke to other winding cores 13 in the event of thermal runaway.

[0057] In some embodiments, the partition 112 is spaced apart from the insulating plate 12, and the conductive bar 14 is located in the gap between the partition 112 and the insulating plate 12. An insulating thermally conductive adhesive wraps the conductive bar 14, sealing the gap between the housing 111, the partition 112, the insulating plate 12, and the conductive bar 14. In other embodiments, a clearance zone may be provided on the partition 112 and / or the insulating plate 12, with the conductive bar 14 located in the clearance zone. The thermally conductive member 17 may be a flexible thermal pad, which is clamped between the conductive bar 14 and the partition 112 or the insulating plate 12 to achieve a seal at the location where the conductive bar 14 is installed.

[0058] Since each partition 112 is provided with a cooling channel 113, the cooling channels 113 in each partition 112 can be connected in parallel or in series, which is not limited in this application. Figure 4 In some embodiments, the cooling channel 113 includes a main liquid inlet channel 1131, a main liquid outlet channel 1132, and a plurality of branch channels 1133. The main liquid inlet channel 1131 and the main liquid outlet channel 1132 are respectively disposed on opposite side walls of the housing 111. The branch channels 1133 are disposed in the partition 112. The branch channels 1133 are connected in parallel, with the liquid inlet end of each branch channel 1133 being connected to the main liquid inlet channel 1131 and the liquid outlet end being connected to the main liquid outlet channel 1132.

[0059] See also Figure 1 and Figure 2 In some embodiments, the battery cell module 10 is generally rectangular, and the winding cores 13 are sequentially arranged in the respective accommodating cavities 10a along the length of the battery cell module 10. The main liquid inlet channel 1131 and the main liquid outlet channel 1132 are respectively provided on the side walls extending along the length of the housing 111, and the branch flow channels 1133 are provided on the remaining side walls of the housing 111 and the respective partitions 112. The branch flow channels 1133 can be a plurality of parallel straight flow channels, a plurality of spaced-apart wavy flow channels, a reciprocating S-shaped flow channel, a spiral flow channel, etc. The specific structure of the branch flow channels 1133 is not limited in this application.

[0060] See also Figure 5In some embodiments, a plurality of weak areas 121 are provided on the insulating plate 12 at positions corresponding to the respective receiving slots 11a, and the melting point of the insulating plate 12 is greater than the temperature of the thermal runaway airflow of the core 13. When a core 13 experiences thermal runaway, the thermal runaway airflow generated by the core 13 will break through the weak area 121 corresponding to the receiving slot 11a in which it is located, and eject the thermal runaway airflow outward. Since the melting point of the insulating plate 12 is greater than the temperature of the thermal runaway airflow of the core 13, the insulating plate 12 will not be burned or melted through by the heat of the thermal runaway airflow. The weak areas 121 at other positions will not break through because they are not subjected to directional impact, thereby protecting the normally operating core 13 from being affected by the thermal runaway airflow and preventing heat from spreading in the battery cell module 10.

[0061] The insulating plate 12 can be made of ceramic material or carbon fiber reinforced composite material. Ceramic material has an extremely high melting point and excellent high temperature resistance, and is suitable for high temperature environment during thermal runaway inside the battery pack 100. Carbon fiber reinforced composite material has the advantage of lightweight while maintaining a high melting point and good mechanical properties. The insulating plate 12 can also be made of aromatic polyamide or continuous glass fiber reinforced polypropylene. Aromatic polyamide has excellent heat resistance and mechanical strength, and is suitable for high temperature environment during thermal runaway inside the battery pack 100. The insulating plate 12 can also be made of silicon-based thermal runaway thermal barrier material or hot-pressed mica board or ceramic silicone rubber composite material, such as one with low density, high fire resistance and excellent thermal insulation effect. When selecting the material of the insulating plate 12, it is necessary to comprehensively consider factors such as its heat resistance, mechanical strength, thermal conductivity, flame retardancy and cost to ensure the safety and reliability of the battery pack 100. At the same time, it is also necessary to consider the processing performance and recyclability of the material to meet the requirements of industrial production and environmental protection.

[0062] The weak area 121 can be a thinner area on the insulation board 12, or a partially hollowed-out (unperforated) area. In some embodiments, the weak area 121 can also be a slit-shaped area. Generally speaking, the strength of the weak area 121 is lower than that of other areas on the insulation board 12. Under the impact of thermal runaway airflow, the weak area 121 becomes a weak point in the insulation board 12, making it susceptible to rupture.

[0063] See also Figure 1 In some embodiments, the battery cell module 10 further includes a top cover 15 connected to the housing 11 and having a gap between the top cover 15 and the insulating plate 12. The gap between the top cover 15 and the insulating plate 12 forms a flue 10b for accommodating thermal runaway airflow. If thermal runaway occurs in one or more cores 13, the thermal runaway flue gas can break through the weak area 121 corresponding to the containment groove 11a, allowing the thermal runaway flue gas to enter the flue 10b.

[0064] See also Figure 6In some embodiments, more than one explosion-proof valve 16 is provided on the top cover 15. The number and position of the explosion-proof valve 16 can correspond one-to-one to the weak area 121. The area of ​​the weak area 121 can be set to be larger than the projection area of ​​the explosion-proof valve 16, so that along the eruption method of the thermal runaway airflow, the projection of the explosion-proof valve 16 can completely fall into the weak area 121, and the thermal runaway airflow can rush through the explosion-proof valve 16 along the shortest path.

[0065] In other embodiments, the number of explosion-proof valves 16 may be smaller than the number of winding cores 13. Compared to the related art in which each battery cell is provided with an explosion-proof valve, the battery cell module 10 of the present application can reduce the number of explosion-proof valves 16, further reducing the cost of the battery cell module 10.

[0066] When the pressure of the thermal runaway flue gas between the top cover 15 and the insulation board 12 reaches the opening pressure of the explosion-proof valve 16, the explosion-proof valve 16 opens to discharge the thermal runaway flue gas. When the pressure of the thermal runaway flue gas is high, multiple explosion-proof valves 16 can be opened simultaneously, quickly discharging a large amount of thermal runaway flue gas in a short period of time, significantly reducing the risk of thermal spread.

[0067] See also Figure 7 and Figure 8 In some embodiments, the core 13 includes an insulating sleeve 131, a core body 132, and an electrolyte (not shown). The insulating sleeve 131 is a hollow structure, and the core body 132 and the electrolyte are both located in the internal space of the insulating sleeve 131. The electrolyte infiltrates the core body 132. The electrolyte can be the electrolyte in the battery cells of the current battery pack. The specific composition is not limited in this application. Two tabs 1321 are provided on the core body 132, one for the positive electrode and the other for the negative electrode.

[0068] The insulating sleeve 131 is made of an insulating material. In some embodiments, the insulating sleeve 131 can also be made of a thermally conductive insulating material, such as a thermally conductive silicone sheet or thermally conductive plastic. The insulating sleeve 131 is in full contact with the housing 11 to transfer heat. The insulating sleeve 131 encloses the winding core 132 and the electrolyte, providing a seal to prevent leakage.

[0069] See also Figure 8In some embodiments, the winding core body 132 includes a positive electrode sheet 1322, a negative electrode sheet 1323, and a separator 1324 for separating the positive electrode sheet 1322 from the negative electrode sheet 1323. The separator 1324 can be an independent part, which is sandwiched between the positive electrode sheet 1322 and the negative electrode sheet 1323 to play an insulating role. The separator 1324 can also be arranged on the outer surface of the positive electrode sheet 1322 and the negative electrode sheet 1323. The positive electrode sheet 1322 can be obtained by coating a positive electrode active material coating on the surface of a first substrate; the negative electrode sheet 1323 can be obtained by coating a negative electrode active material coating on the surface of a second substrate. The first substrate and the second substrate are both current collectors, and the materials of the two can be the same or different. The positive electrode tab can be electrically connected to or integrated with the first substrate; the negative electrode tab can be electrically connected to or integrated with the second substrate.

[0070] See also Figure 9 、 Figure 10 and Figure 11 According to a second embodiment of the present application, a battery pack 100 is provided, comprising a housing 20 and one or more battery cell modules 10 according to the first embodiment, wherein the battery cell modules 10 are installed in the housing 20. The battery pack 100 can be a low-power battery pack 100 (no more than 400W, voltage no more than 50V), which can be used in electric bicycles; the battery pack 100 can also be a high-power power battery (voltage above 400V), configured with multiple battery cell modules 10, and used in electric vehicles.

[0071] See also Figure 9 、 Figure 10 and Figure 11 In some embodiments, the battery pack 100 includes more than one battery cell module 10, and the more than one battery cell module 10 forms a temperature regulation unit. When the temperature regulation unit includes at least two battery cell modules 10, the cooling channels 113 of the battery cell modules 10 in the same temperature regulation unit are interconnected via the pipeline 30, thereby sharing the same temperature control system 300 (including the water tank 310, water pump 320, radiator 330, etc.).

[0072] See also Figure 10 and Figure 11 In some embodiments, the battery pack 100 is provided with two or more temperature regulation units, and the cooling channels 113 of each temperature regulation unit are independent of each other. The temperature of each temperature regulation unit can be adjusted by controlling the temperature and flow rate of the coolant to achieve a better temperature uniformity.

[0073] See also Figure 12According to a third embodiment of the present application, a vehicle 1000 is provided, comprising a vehicle body 200, a temperature control system 300, and one or more battery packs 100 according to the second aspect. The battery pack 100 and the temperature control system 300 are respectively mounted on the vehicle body 200, and the coolant in the cooling channel 113 of the battery pack 100 exchanges heat with the temperature control system 300. The vehicle 1000 may be an electric bicycle, a pure electric vehicle, a plug-in hybrid vehicle, or a range-extended hybrid vehicle, and this application does not impose any restrictions thereon.

[0074] See also Figure 12 In some embodiments, the temperature control system 300 may include a water tank 310, a water pump 320, and a radiator 330 connected by a pipe 30. The water pump 320 drives the coolant to circulate through the water tank 310, the radiator 330, and the cooling channel 113 of the battery pack 100. The radiator 330 may dissipate heat through external airflow when the vehicle 1000 is driving, or through air cooling by a separately provided fan 340. The temperature control system 300 may also include several valves (e.g., one-way valves, throttle valves, reversing valves, etc.) and sensors (e.g., temperature sensors for detecting coolant temperature, flow sensors for detecting coolant flow, etc.). The valves and sensors may be installed on the pipe 30 of the temperature control system 300 or in the battery pack 100. For more information about the temperature control system 300, please refer to the disclosures of related technologies and will not be repeated here.

[0075] In some embodiments, the number of temperature control systems 300 is equal to the number of temperature adjustment units. The coolant in the cooling channel 113 of each temperature adjustment unit of the battery pack 100 exchanges heat with the corresponding temperature control system 300. If the battery pack 100 has two or more temperature adjustment units, two or more temperature control systems 300 are also provided. By combining different battery cell modules 10, multiple independent temperature control zones can be formed. The temperature of each temperature control zone can be independently adjusted as required, achieving localized heating or cooling of the battery pack 100.

[0076] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0078] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0079] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0080] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0082] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0083] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell module, characterized in that: include: The shell is provided with a plurality of receiving slots; the shell is provided with a cooling flow channel; A plurality of winding cores and a plurality of conductive bars, wherein the winding cores are arranged in a plurality of accommodating slots of the shell in a one-to-one correspondence to exchange heat with the cooling channels of the shell; two adjacent winding cores are electrically connected through the conductive bars.

2. The battery cell module according to claim 1, characterized in that A heat conducting member is provided between the conductive bar and the shell, and the conductive bar and the shell exchange heat through the heat conducting member.

3. The battery cell module according to claim 2, characterized in that: The housing includes an outer shell and a plurality of partitions; the plurality of partitions are arranged in the inner cavity of the outer shell at intervals and connected to the outer shell to divide the inner cavity of the outer shell into a plurality of the receiving slots; The cooling channel is provided in the shell and / or the partition.

4. The battery cell module according to claim 3, characterized in that: The cooling channel is provided in each of the partitions; and the heat conducting member is provided between the conductive bar and the partitions.

5. The battery cell module according to claim 3 or 4, characterized in that: The cooling channel includes a liquid inlet main channel, a liquid outlet main channel and a plurality of branch channels; the liquid inlet main channel and the liquid outlet main channel are respectively arranged on opposite side walls of the shell; the branch channels are arranged in the partition.

6. The battery cell module according to claim 3 or 4, characterized in that: The heat conducting member is an insulating heat conducting adhesive; the insulating heat conducting adhesive seals the gap between the housing and the conductive bar.

7. The battery cell module according to any one of claims 1 to 4, characterized in that: The battery cell module further includes: The insulating plate is connected to the shell and covers the notch of the accommodating groove to enclose and form a plurality of mutually independent and sealed accommodating cavities; the plurality of winding cores are arranged in the plurality of accommodating cavities in a one-to-one correspondence.

8. The battery cell module according to claim 7, characterized in that: The insulating plate is provided with a plurality of weak areas at positions corresponding to the receiving slots; the melting point of the insulating plate is greater than the temperature of the thermal runaway airflow of the winding core.

9. The battery cell module according to claim 8, characterized in that: The battery cell module further includes: A top cover is connected to the shell and has a gap with the insulating plate; and one or more explosion-proof valves are provided on the top cover.

10. The battery cell module according to any one of claims 1 to 4, characterized in that: The winding core comprises: Insulation sleeve; A winding core body is provided in the insulating sleeve, wherein the winding core body includes a positive electrode sheet, a negative electrode sheet, and a separator for separating the positive electrode sheet from the negative electrode sheet; The electrolyte is arranged in the insulating sleeve and soaks the winding core body.

11. A battery pack, characterized in that: It comprises a box body and one or more battery cell modules according to any one of claims 1 to 10; the battery cell module is installed in the box body.

12. The battery pack according to claim 11, wherein: The battery pack is provided with more than two temperature regulating units; the temperature regulating unit includes more than one battery cell module, and the cooling channels of the battery cell modules located in the same temperature regulating unit are connected; the cooling channels of each temperature regulating unit are independent of each other.

13. A vehicle, characterized in that: It comprises a vehicle body, a temperature control system and a battery pack according to one or more claims 11 or 12; the battery pack and the temperature control system are respectively mounted on the vehicle body; the coolant in the cooling channel of the battery pack exchanges heat with the temperature control system.

14. The battery pack according to claim 13, wherein: The number of the temperature control systems is the same as the number of the temperature regulating units of the battery pack; the coolant in the cooling channel of each temperature regulating unit of the battery pack is heat-exchanged with the corresponding temperature control system respectively.

Images