CN111653851B - Battery pack convenient for heat transfer calculation - Google Patents
Battery pack convenient for heat transfer calculation Download PDFInfo
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- CN111653851B CN111653851B CN202010365417.3A CN202010365417A CN111653851B CN 111653851 B CN111653851 B CN 111653851B CN 202010365417 A CN202010365417 A CN 202010365417A CN 111653851 B CN111653851 B CN 111653851B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
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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 invention discloses a battery pack convenient for heat transfer calculation, which comprises a plurality of battery modules connected in series and a plurality of heat transfer modules corresponding to the battery modules one to one; each heat transfer module comprises a plurality of convection elements for transferring heat, a first capacity element and a second capacity element for calculating the flow of a heat dissipation medium; the plurality of convection elements comprise a left convection element, a right convection element, a plurality of upper convection elements and a plurality of lower convection elements; the first capacity element is connected with the corresponding right convection element and the upper convection element to calculate the flow of the heat dissipation medium on the right side and the upper side of the corresponding battery module, and the second capacity element is connected with the corresponding lower convection element to calculate the flow of the heat dissipation medium on the lower side of the corresponding battery module. The invention has the beneficial effects that: the convection elements are arranged on the upper side, the lower side, the left side and the right side of the battery module respectively to calculate the flow of the heat dissipation medium, so that the heat transfer of the battery pack can be calculated more accurately, and the heat dissipation design of the battery pack is facilitated.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of battery thermal management, in particular to a battery pack convenient for heat transfer calculation.
[ background of the invention ]
With the continuous consumption of non-renewable resources and the increasing prominence of environmental issues, lithium ion batteries have been developed very rapidly in recent years. Particularly, in the transportation field, an electric vehicle using a lithium ion battery as power has become a future trend, however, the charging problem of a battery car also comes along, especially in an emergency situation, for which an electric compensation car should be transported, because the lithium ion battery is a secondary battery, a large amount of heat is generated in the charging and discharging process, if the heat cannot be effectively dissipated, the battery will be out of control due to heat, and a fire or even an explosion safety accident will be caused, so that the electric compensation car must ensure automatic safety and reliability as an electric compensation tool in an emergency situation. In the prior art, an air-cooled heat dissipation battery pack is generally adopted for a mobile electricity supplementing vehicle, so a proper fan needs to be selected in the design process of the battery pack, however, a large amount of heat transfer calculation is involved in the selection process, but the current battery pack is not designed aiming at the heat transfer calculation, and the heat transfer calculation of the battery pack is prone to inaccurate phenomenon, so that the safety of the battery pack is affected.
In view of the above, it is desirable to provide a battery pack that facilitates heat transfer calculation to overcome the above-mentioned drawbacks.
[ summary of the invention ]
The invention aims to provide a battery pack convenient for heat transfer calculation, and aims to conveniently acquire heat transfer data of the battery pack during cooling so as to facilitate the heat dissipation design of the battery pack.
In order to achieve the above object, the present invention provides a battery pack convenient for heat transfer calculation, which includes a plurality of battery modules connected in series and a plurality of heat transfer modules corresponding to the battery modules one to one; each heat transfer module comprises a plurality of convection elements for transferring heat, a first capacity element and a second capacity element for calculating the flow of a heat dissipation medium; the plurality of convection elements comprise a left convection element, a right convection element, a plurality of upper convection elements and a plurality of lower convection elements, the left convection element and the right convection element are respectively arranged at the left side and the right side of the corresponding battery module, and the plurality of upper convection elements and the plurality of lower convection elements are respectively arranged at the upper side and the lower side of the corresponding battery module; the first capacity element is connected with the corresponding right convection element and the upper convection element to calculate the flow of the heat dissipation medium on the right side and the upper side of the corresponding battery module, and the second capacity element is connected with the corresponding lower convection element to calculate the flow of the heat dissipation medium on the lower side of the corresponding battery module.
In a preferred embodiment, the battery pack further comprises a starting-end convection element and a terminal convection element, wherein the starting-end convection element and the terminal convection element are respectively connected with the two battery modules at two ends, the starting-end convection element is connected with the first capacity element, the second capacity element and the left convection element of the corresponding battery module to define an initial state that the heat dissipation medium enters the battery pack, and the terminal convection element is connected with the first capacity element of the corresponding battery module to obtain a final state that the heat dissipation medium flows out of the battery pack.
In a preferred embodiment, a first shunt element is disposed between two adjacent battery modules, and the first shunt element connects the second capacity element and the left convection element of one battery module with the second capacity element and the right convection element of the other battery module to distribute the flow rate ratio of the heat dissipation medium in the two corresponding battery modules.
In a preferred embodiment, the starting-end convection element is provided with a second flow dividing member for connecting the corresponding first capacity element, second capacity element and left convection element, and a third capacity element for calculating the flow rate of the heat dissipation medium is provided between the second flow dividing member and the corresponding first capacity element.
In a preferred embodiment, each battery module is provided with a pair of first convection ports connected to the corresponding first capacity elements, a pair of second convection ports connected to the corresponding second capacity elements, a left convection port connected to the corresponding left convection element, and a right convection port connected to the corresponding right convection element.
In a preferred embodiment, each battery module includes a plurality of unit batteries connected in series, each unit battery is provided with a heat capacity element connected to an upper convection element and a lower convection element and used for calculating a temperature change, and two heat capacity elements located on the left and right sides in each battery module are respectively connected to the corresponding left convection element and right convection element.
In a preferred embodiment, a first heat conduction element for calculating contact heat conduction between two corresponding single batteries is connected between two adjacent heat capacity elements.
In a preferred embodiment, a second heat conducting element for calculating the heat conduction of the electrical connection between the corresponding two unit cells is connected between the two adjacent heat mass elements.
In a preferred embodiment, each battery module is provided with two heat conducting ports for summarizing calculation results of the corresponding first heat conducting element and the second heat conducting element, and the two heat conducting ports are respectively connected to the corresponding two heat capacity elements through the corresponding left convection element and the corresponding right convection element.
According to the battery pack convenient for heat transfer calculation, the convection elements are respectively arranged on the upper side, the lower side, the left side and the right side of the battery module to calculate the flow of the heat dissipation medium, so that the heat transfer of the battery pack can be calculated more accurately, and the heat dissipation design of the battery pack is facilitated.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
FIG. 1 is a schematic electrical connection diagram of a battery pack provided in accordance with the present invention to facilitate heat transfer calculations;
FIG. 2 is an electrical schematic diagram of the heat exchange module of FIG. 1;
fig. 3 is a port explanatory diagram of the battery module of fig. 1.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, the present invention provides a battery pack 100 for calculating heat transfer, which is mainly used for calculating heat transfer amount of the battery pack during cooling to facilitate heat dissipation design of the battery pack.
In the embodiment of the present invention, the battery pack 100 for facilitating heat transfer calculation includes a plurality of battery modules 10 connected in series and a plurality of heat exchange modules 11 corresponding to the battery modules 10 one by one; each heat exchange module 11 comprises a plurality of convection elements 20 for heat transfer and a first capacity element 30 and a second capacity element 31 for calculating the flow of a heat dissipation medium, the plurality of convection elements 20 include a left convection element 201, a right convection element 202, a plurality of upper convection elements 203 and a plurality of lower convection elements 204, the left convection element 201 and the right convection element 202 are respectively disposed at left and right sides of the corresponding battery module 10, the plurality of upper convection elements 203 and the plurality of lower convection elements 204 are respectively disposed at upper and lower sides of the corresponding battery module 10, the first capacity element 30 is connected to the corresponding right convection element 202 and the corresponding upper convection element 203 for calculating flow rates of heat dissipation media at right and upper sides of the corresponding battery module 10, and the second capacity element 31 is connected to the corresponding lower convection element 204 for calculating flow rates of heat dissipation media at lower sides of the corresponding battery module 10.
Next, a first current dividing element 40 is disposed between two adjacent battery modules 10, and the first current dividing element 40 connects the second capacity element 31 and the left convection element 201 of one battery module 10 with the second capacity element 31 and the right convection element 202 of the other battery module 10 to distribute the flow rate ratio of the heat dissipation medium in the two adjacent battery modules 10.
Meanwhile, in order to facilitate the series connection of two adjacent battery modules 10, each battery module 10 is provided with a pair of first convection ports 101 connected to the corresponding first capacity elements 30, a pair of second convection ports 102 connected to the corresponding second capacity elements 31, a left convection port 103 connected to the corresponding left convection element 201, and a right convection port 104 connected to the corresponding right convection element 202, in this way, the adjacent two battery modules 10 can connect the corresponding two first capacity elements 30 through the first convection port 101, corresponding two second volume elements 31 are connected by the second convection port 102, and corresponding left convection element 201 is connected by the left convection port 103 and right convection port 104 to corresponding right convection element 202, this not only facilitates collection of the convective heat transfer data (flow variation of the heat dissipating medium) of each battery module 10, but also makes the battery pack simpler and more convenient in the assembly process.
Then, the battery pack 100 for facilitating heat transfer calculation further includes a beginning-end convection element 12 and a ending-end convection element 13, the beginning-end convection element 12 and the ending-end convection element 13 are respectively connected to the two battery modules 10 at two ends, the beginning-end convection element 12 is connected to the first capacity element 30, the second capacity element 31 and the left convection element 201 of the corresponding battery module 10 for defining an initial state of the heat dissipation medium entering the battery pack, the ending-end convection element 13 is connected to the first capacity element 30 of the corresponding battery module 10 for obtaining a final state of the heat dissipation medium flowing out of the battery pack, thus, the total heat absorbed by the heat dissipation medium in the primary circulation heat dissipation process can be obtained, the heat dissipation capacity and the heat dissipation effect of the heat dissipation medium at each position of the battery pack can be more accurately analyzed by combining the heat transfer data of the convection element 20, so that the initial state of the heat dissipation medium entering the battery pack can be adjusted by the starting convection member 12.
Meanwhile, the beginning convection element 12 is provided with a second shunt member 41 for connecting the corresponding first capacity element 30, second capacity element 31 and left convection element 201, and a third capacity element 32 for calculating the flow of the heat dissipation medium is provided between the second shunt member 41 and the corresponding first capacity element 30, that is, the heat dissipation medium enters the battery pack from the left side, the lower side and the upper side of the battery pack to conveniently cover each part of the battery pack, and finally flows out from the right side of the battery pack, in this process, the second shunt member 41 is used for defining the flow parameter of the heat dissipation medium entering the battery pack, and the third capacity element 32 is also used for defining the flow parameter of the heat dissipation medium entering the upper part of the battery pack.
In the present embodiment, each battery module 10 includes a plurality of cells 50 connected in series, each cell 50 is provided with a heat mass 501 connected to an upper convection element 203 and a lower convection element 204 for calculating a temperature change, and two heat mass 501 of each battery module 10 located at the left and right sides are respectively connected to a corresponding left convection element 201 and right convection element 202, that is, an upper convection element 203 and a lower convection element 204 are respectively located at the upper and lower sides of each cell 50, wherein two cells 50 located at the two ends of the corresponding battery module 10 are further provided with a left convection element 201 and a right convection element 202, respectively, so that each part of each battery module 10 can calculate a flow rate of a heat dissipation medium for heat transfer, and then a heat transfer model for heat dissipation of the battery pack is established on the basis, so that the heat transfer calculation of the battery module 10 is more accurate, thereby facilitating the heat dissipation design of the battery pack.
Further, because the phenomena of contact heat conduction and electrical connection heat conduction exist between two adjacent single batteries 50, for this reason, a first heat conduction element 502 for calculating the contact heat conduction between two corresponding single batteries 50 and a second heat conduction element 503 for calculating the electrical connection heat conduction between two corresponding single batteries 50 are connected between two adjacent heat capacity elements 501, so that a heat transfer model for heat dissipation of the battery pack can be optimized by combining calculation results of the first heat conduction element 502 and the second heat conduction element 503, and the accuracy of heat transfer calculation is further improved.
Meanwhile, in order to obtain the calculation results of the first heat conducting element 502 and the second heat conducting element 503, each battery module 10 is provided with two heat conducting ports 105 for summarizing the calculation results corresponding to the first heat conducting element 502 and the second heat conducting element 503, the two heat conducting ports 105 are respectively connected to the corresponding two heat mass elements 501 through the corresponding left convection element 201 and the right convection element 202, and the two adjacent battery modules 10 are interconnected through the two heat conducting ports 105.
It should be further noted that, in order to facilitate the electrical connection between one battery module 10 and another battery module 10, each battery module 10 is further provided with a positive port 106 and a negative port 107 for electrical connection, and the first convection port 101, the second convection port 102, the left convection port 103, the right convection port 104, the heat conduction port 105, the positive port 106 and the negative port 107 on the battery module 10 may be integrated on a circuit board and then mounted on the corresponding battery module 10 (not shown). The convection element 20, the first volume element 30 and the second volume element 31 of the heat exchange module 11 are respectively disposed at corresponding positions in a heat sink (not shown).
In summary, the battery pack 100 convenient for heat transfer calculation provided by the invention establishes the heat transfer model of the battery pack by calculating the flow change of the heat dissipation medium around the battery, and then realizes the calculation of the battery contact heat conduction and the electric connection heat conduction and the optimization of the heat transfer model by the first heat conduction element and the second heat conduction element, so that the accuracy of the heat transfer calculation of the battery pack can be better improved, and the purpose of optimizing the heat dissipation design is achieved.
The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (8)
1. A battery pack convenient for heat transfer calculation is characterized by comprising a plurality of battery modules connected in series and a plurality of heat transfer modules corresponding to the battery modules one by one; each heat transfer module comprises a plurality of convection elements for transferring heat, a first capacity element and a second capacity element for calculating the flow of a heat dissipation medium; the plurality of convection elements comprise a left convection element, a right convection element, a plurality of upper convection elements and a plurality of lower convection elements, the left convection element and the right convection element are respectively arranged at the left side and the right side of the corresponding battery module, and the plurality of upper convection elements and the plurality of lower convection elements are respectively arranged at the upper side and the lower side of the corresponding battery module; the first capacity element is connected with the corresponding right convection element and the corresponding upper convection element to calculate the flow of the heat dissipation medium on the right side and the upper side of the corresponding battery module, and the second capacity element is connected with the corresponding lower convection element to calculate the flow of the heat dissipation medium on the lower side of the corresponding battery module; and a first shunt element is arranged between two adjacent battery modules, and connects the second capacity element and the left convection element of one battery module with the second capacity element and the right convection element of the other battery module by the first shunt element so as to distribute the flow proportion of the heat dissipation medium in the two corresponding battery modules.
2. The battery pack convenient for heat transfer calculation according to claim 1, further comprising a beginning convection element and a ending convection element, wherein the beginning convection element and the ending convection element are respectively connected to the two battery modules at two ends, the beginning convection element is connected to the first capacity element, the second capacity element and the left convection element of the corresponding battery module for defining an initial state of the heat dissipation medium entering the battery pack, and the ending convection element is connected to the first capacity element of the corresponding battery module for obtaining a final state of the heat dissipation medium flowing out of the battery pack.
3. The battery pack for facilitating heat transfer calculation according to claim 2, wherein the start-end convection element is provided with a second shunt member for connecting the corresponding first capacity element, the second capacity element and the left convection element, and a third capacity element for calculating the flow rate of the heat dissipation medium is provided between the second shunt member and the corresponding first capacity element.
4. The battery pack for facilitating heat transfer calculation of claim 1, wherein each battery module is provided with a pair of first convection ports connected to the corresponding first capacity element, a pair of second convection ports connected to the corresponding second capacity element, a left convection port connected to the corresponding left convection element, and a right convection port connected to the corresponding right convection element.
5. The battery pack for facilitating heat transfer calculation of claim 1, wherein each battery module comprises a plurality of unit batteries connected in series, each unit battery is provided with a heat capacity element connected to an upper convection element and a lower convection element for calculating temperature variation, and two heat capacity elements on left and right sides of each battery module are respectively connected to the corresponding left convection element and right convection element.
6. The battery pack for facilitating heat transfer calculation according to claim 5, wherein a first heat conducting element for calculating contact heat conduction between corresponding two unit cells is connected between two adjacent heat capacity elements.
7. The battery pack for facilitating heat transfer calculation of claim 6, wherein a second heat conducting element for calculating heat conduction of electrical connection between two corresponding unit cells is connected between two adjacent heat capacity elements.
8. The battery pack for facilitating heat transfer calculation of claim 7, wherein each battery module is provided with two heat conducting ports for collecting the calculation results of the corresponding first and second heat conducting elements, and the two heat conducting ports are respectively connected to the corresponding two heat capacity elements through the corresponding left and right convection elements.
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