Battery system box energy storage liquid cooling plate, battery system box and battery system
The double-layer liquid cooling plate design, combined with parallel and series flow channels and swirling turbulent flow structures, solves the welding problems and poor flow channel compatibility problems of existing liquid cooling plate designs, achieves high temperature uniformity, low cost and high adaptability of the battery system box, and supports the application of various battery system boxes.
Patent Information
- Application Number
- CN202422919533.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing battery system box liquid cold plate design has problems such as poor welding quality control, easy leakage, non-removable and replaceable, poor product adaptability, flow channel design incompatible with multiple product modules, high cost of small package design, and difficulty in achieving low-cost, platform and modular applications.
A double-layer liquid cooling plate design is adopted, including a flow channel stamping plate and a module temperature plate, forming parallel and series flow channels. Combined with a swirling turbulent flow structure, it is connected to the battery cell through a thermally conductive material. The flow channel design meets the requirements of temperature uniformity and flow resistance, and is equipped with fixing holes to adapt to battery system boxes of different sizes.
The liquid cooling plate achieves high temperature uniformity, low cost, platformization and high adaptability. The flow channel design ensures that the temperature difference of the battery cells is within 3°C, the flow resistance is controlled below 30kPa, and supports detachable iteration and adaptation of various battery system boxes.
Smart Images
Figure CN223450989U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery box liquid cooling plate technical field, especially battery system box energy storage liquid cooling plate, battery system box and battery system. BACKGROUND
[0002] With the rapid development of renewable energy, the demand for energy storage technology is increasing. Traditional air cooling and natural cooling methods have certain limitations in efficiency and reliability. Liquid cooling plate as a new cooling technology can effectively solve these problems and improve the overall performance of the energy storage module. Therefore, the application of energy storage module liquid cooling plate has important practical significance and broad application prospect. Energy storage technology plays a crucial role in modern energy systems, and the application of liquid cooling plate further improves the efficiency and safety of the energy storage module.
[0003] With the requirements of integration and low cost of energy storage system, the energy storage module box also needs to be more integrated, which puts higher requirements on the design of the energy storage module box liquid cooling plate. On the one hand, the energy storage liquid cooling plate needs to have wide compatibility and adaptability to the size of the box and module package, and on the other hand, the energy storage liquid cooling plate needs to achieve a temperature difference of not more than 3℃ or even higher in the application of the cooling effect of the battery cell. Therefore, the pursuit of liquid cooling plate that can meet the requirements of high uniform temperature, high integration, high adaptability, and detachable replacement is the technical goal.
[0004] The current battery system box liquid cooling plate design can be divided into several structural forms according to the process, such as harmonica tube type, extruded profile plugging type, bent pipe type, and integrated stamping type. In combination with the design of the box structure, it is divided into split type and integrated type liquid cooling plate. The split type liquid cooling plate occupies more space and is not conducive to the integration of the energy storage system module. The integrated liquid cooling plate and the box are connected by stirring friction welding, or an aluminum profile box is used to realize welding and plugging by using the cross section of the aluminum profile. Both have the problems of poor welding quality control, easy internal leakage, non-detachable replacement, and poor product adaptability. At the same time, for the design of the liquid cooling plate flow channel, the aluminum profile cross section flow channel has limitations in optimizing the flow channel pipeline flow distribution, system module temperature control, and liquid cooling plate design compatibility with multiple product module package design, which is not conducive to low-cost, platform, and modular development and application. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the defects of the prior art and providing a battery system box energy storage liquid cooling plate, a battery system box, and a battery system.
[0006] The utility model discloses a first aspect provides a kind of battery system box energy storage liquid cooling plate, including liquid cooling plate, the liquid cooling plate is double-layer structure, by flow passage stamping plate and module uniform temperature plate are formed, the flow passage stamping plate is fixed with module uniform temperature plate, inside is formed for the flow passage of liquid cooling medium circulation, the module uniform temperature plate is flat plate, for being connected with battery module by heat conduction material to cool battery;The flow passage stamping plate is formed by flat stamping, surface stamping forms the flow passage of required shape;The surface of the liquid cooling plate is arranged with liquid inlet and liquid outlet in front end position, the flow passage includes first flow passage and second flow passage, the first flow passage is parallel flow passage, the second flow passage is series flow passage, the first flow passage is communicated with liquid inlet, the second flow passage is communicated with liquid outlet, the first flow passage and second flow passage are communicated in the rear end side of liquid cooling plate;Convolute turbulent structure that the second flow passage is arranged by first rib and second rib misregistration is formed;The convolute turbulent structure is multiple, and is sequentially arranged in second flow passage along the direction of cooling medium.
[0007] Wherein, the first flow passage is at least two groups, each independent, parallel arrangement;Each group of the first flow passage includes multiple rib plates parallel to each other along the length of liquid cooling plate, and the liquid cooling medium flows along the serpentine trajectory in the flow passage on both sides of the rib plate, and finally flows into the second flow passage.
[0008] Wherein, each group of convolute turbulent structure is formed by a plurality of parallel first ribs and a plurality of parallel second ribs, the length direction of the first rib and the second rib is parallel to the length direction of the liquid cooling plate, the first rib is arranged downstream of the second rib, the number of the first rib is greater than the number of the second rib, and two adjacent first ribs are symmetrically arranged in the axial direction of the second rib.
[0009] Wherein, the upper surface of the liquid cooling plate is arranged with a dummy flow passage in the position near the front end.
[0010] Wherein, the surface of the liquid cooling plate is arranged with a plurality of fixed holes arranged at intervals in the position near the periphery along the periphery of the liquid cooling plate, for fixing the liquid cooling plate and the battery system box.
[0011] Wherein, the liquid cooling plate has a module beam fixing hole, the module beam fixing hole is designed in a regional manner, and is arranged in the middle, front and rear parts of the liquid cooling plate.
[0012] Wherein, the flow passage stamping plate and the module uniform temperature plate are welded and fixed, and a seal is formed at the welding position.
[0013] Wherein, the flow passage stamping plate and the module uniform temperature plate are aluminum plates.
[0014] The second aspect of the utility model provides a battery system box, which comprises the battery system box energy storage liquid cooling plate.
[0015] In a third aspect, the utility model provides a battery system box energy storage liquid cooling plate, including battery system box.
[0016] The utility model discloses battery system box energy storage liquid cooling plate, because its flow channel includes first flow channel and second flow channel, first flow channel is parallel flow channel, second flow channel is series flow channel, first flow channel with liquid inlet interface communicates, second flow channel with liquid outlet interface intercommunication, first flow channel and second flow channel in the near rear end side of liquid cooling plate communicate, the second flow channel is arranged in the second flow channel by the first rib and the second rib staggered arrangement constitute multiple groups of convolute turbulent structure, and the cooling medium flow direction is arranged in second flow channel in sequence interval, like this can realize guarantee each electric core module flow channel position block's cooling liquid flow rate's deployment and the overall liquid cooling plate's isothermal, satisfies energy storage liquid cooling battery system module to the cooling performance's requirement of liquid cooling plate. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the three -dimensional structure schematic diagram of battery system box energy storage liquid cooling plate of the utility model.
[0018] Figure 2 It is the battery system box energy storage liquid cooling plate of the utility model shows the overhead structure intention.
[0019] Figure 3 It is the battery system box energy storage liquid cooling plate of the utility model can adapt different size electric core module's schematic diagram. DETAILED DESCRIPTION
[0020] The utility model will be further explained in detail below combining with the specific embodiment and the drawing. It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.
[0021] Please see Figures 1-2As shown, the first aspect of the present invention provides a battery system box energy storage liquid cooling plate 100, which is an integrated liquid cooling plate structure, including a liquid cooling plate, the liquid cooling plate is a double-layer structure, composed of a flow channel stamping plate and a module temperature plate, the flow channel stamping plate is fixed to the module temperature plate, and a flow channel for the circulation of liquid cooling medium is formed inside, the module temperature plate is a flat plate, which is used to connect with the battery module through a heat conductive material (such as a heat conductive glue or a heat conductive pad) to cool the battery cell, and is used to cool the battery cell by being attached to the battery cell; the flow channel stamping plate is formed by stamping a flat plate, and the surface is stamped into the desired shape flow channel; a liquid inlet interface 3 and a liquid outlet interface 4 are arranged near the front end of the surface of the liquid cooling plate, and the flow channel includes a first flow channel 2 and a second flow channel 1, the first flow channel 2 is a parallel flow channel, and the second flow channel 1 is a series flow channel, the first flow channel is communicated with the liquid inlet interface, and the second flow channel is communicated with the liquid outlet interface, and the first flow channel and the second flow channel are communicated near the rear end side of the liquid cooling plate; a swirling turbulent flow structure composed of staggered first ribs 11 and second ribs 12 is arranged in the second flow channel; the swirling turbulent flow structure is multiple groups, which are arranged in the second flow channel at intervals along the flow direction of the cooling medium.
[0022] Through the design and arrangement of the above flow channels, the liquid cooling medium can be made to flow through parallel flow channels when entering the liquid cooling to cool the battery cells. For example, when there are four rows of battery cells (along the width of the liquid cooling plate, the first to fourth rows of battery cells are arranged in the direction from the liquid inlet joint to the liquid outlet joint), the first three rows of battery cells are cooled by parallel flow channels, and the last row of battery cells is cooled by series flow channels. Through the simulation module, this design structure can ensure the allocation of the coolant flow rate of the flow channel position block of each battery cell module and the temperature uniformity of the entire liquid cooling plate, thereby meeting the cooling performance requirements of the energy storage liquid cooling battery system module for the liquid cooling plate. The overall liquid cooling plate has the technical characteristics of good temperature uniformity, low cost, platformization, detachable iteration, and high adaptability.
[0023] Specifically, the length and width of the flow channel are refined and designed based on the heating parameters of the battery cell, parameter calculation and simulation results.
[0024] In some embodiments, the first flow channel 2 is at least two groups, each independently and in parallel arrangement; each group of the first flow channel includes a plurality of rib plates arranged along the length of the liquid cooling plate and parallel to each other, and the liquid cooling medium flows along a serpentine trajectory in the flow channel on both sides of the rib plate, and finally flows into the second flow channel 1. More preferably, each group of the first flow channel includes three rib plates, respectively including an independent first rib plate 20 through which the cooling liquid medium enters the first flow channel through the outer side flow channel, and three second rib plates 21 parallel to each other, the cooling liquid medium enters the outer side flow channel of the first rib plate 20, and after entering, it is folded at the end to enter the flow channel outside two adjacent second rib plates 21, and after folding, it flows straight to the front end direction of the liquid cooling plate, and after flowing to the front end of the two second rib plates, it is folded again to enter the flow channel outside the third second rib plate 21, and then flows out to enter the first flow channel 1.
[0025] The embodiment of the present application adopts series-parallel flow channels, ensures temperature difference while reducing flow resistance, and through the design of the cooling plate flow path, the cooling liquid enters the first three column battery module using parallel flow channels, so that the temperature difference of the first three column battery module is as consistent as possible, and the last column battery module uses series flow channels, and the cooling liquid flows out.
[0026] In some embodiments, each group of the convective turbulence structure is composed of a plurality of parallel and spaced first ribs 11 and a plurality of parallel and spaced second ribs 12, the length direction of the first ribs and the second ribs is parallel to the length direction of the liquid cooling plate, the first ribs are arranged downstream of the second ribs, the number of the first ribs is greater than the number of the second ribs, and two adjacent spaced first ribs are symmetrically arranged in the axis direction of the second rib. The staggered flow channel structure of the second flow channel 1 promotes the formation of a convective turbulence structure in the last battery module flow channel position block, ensures the adjustment of the cooling liquid flow rate of each module flow channel position block and the uniformity of the overall liquid cooling plate, and controls the overall flow channel flow resistance to be below 30 kpa, meeting the requirements of the energy storage liquid cooling system module for the flow resistance of the liquid cooling plate.
[0027] In some embodiments, a false flow channel 7 is arranged at a position near the front end of the upper surface of the liquid cooling plate. Through the arrangement of the false flow channel process, the forming and exhaust needs of the liquid cooling plate can be met, and the overall flatness requirement of the liquid cooling plate is ensured.
[0028] In some embodiments, a plurality of fixed holes 5 are arranged at a position near the periphery of the surface of the liquid cooling plate along the periphery of the liquid cooling plate, with a spacing of 80-100 mm, for fixing the liquid cooling plate to the battery system box, which can be adapted to various integrated battery system boxes, and can be integrated as a sealing surface on the battery system box to meet the sealing requirements of the battery system box. It can be flexibly applied to hot melt self-tapping FDS, self-piercing riveting SPR and other processes to realize the connection of different metal materials, or to realize the detachable and iterative process connection form by pull riveting.
[0029] In some embodiments, the liquid cooling plate has module crossbeam fixing holes 6, which are designed in a regional manner and arranged in the middle, front and rear parts of the liquid cooling plate. This design considers the position requirements of the small-size battery module package fixing points and regionalizes the module crossbeam fixing point positions to adapt to the cooling requirements of battery modules of different sizes. Figure 3
[0030] In the embodiments of the present application, the flow channel stamping plate and the module uniform heat spreader are welded and fixed, and a seal is formed at the welding position, preferably by brazing. Preferably, the flow channel stamping plate and the module uniform heat spreader are made of aluminum plates or other metal materials or alloy materials, and the specific material is not limited and can be selected as needed.
[0031] In the second aspect of the embodiments of the utility model, a battery system box is provided, which comprises a battery system box energy storage liquid cooling plate, the bottom of the rectangular frame of the bottom of the battery system box is directly connected with the battery system box energy storage liquid cooling plate, such as through the fixing hole, thereby forming a battery system box, the battery system box energy storage liquid cooling plate is directly used as the bottom plate of the battery system box, the surface of which is fixed with a module crossbeam, the module crossbeam is installed and fixed through the module crossbeam fixing hole, and then the battery module is fixed and installed through the module crossbeam.
[0032] In the third aspect of the embodiments of the utility model, a battery system is provided, which comprises a battery system box, the battery module is fixed in the battery system box through the module crossbeam, and the battery system comprises a box cover, thereby forming the battery system. As shown in Figure 3 Figure 3 The battery module can be arranged in four rows to form a 13+13 battery structure (composed of two battery modules arranged with a spacing, and each row of each module is composed of 13 stacked battery cells), a 14+12 battery structure (composed of two battery modules arranged with a spacing, each row of one module is composed of 14 stacked battery cells, and each row of one module is composed of 12 stacked battery cells), a 12+12 battery structure (composed of two battery modules arranged with a spacing, and each row of each module is composed of 12 stacked battery cells), and a 27 battery structure (composed of one battery module arranged with a spacing, and each row of each module is composed of 27 stacked battery cells). Figure 3 In the battery module shown in
[0033] The basic principle and main features of the present application and the advantages of the present application are shown and described above, for those skilled in the art, obviously the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application.
[0034] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.
[0035] In addition, it should be understood that although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, the description manner of the specification is only for clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments which can be understood by those skilled in the art.
Claims
1. The battery system box energy storage liquid cooling plate includes a liquid cooling plate. The liquid cooling plate is a double-layer structure, consisting of a flow channel stamping plate and a module temperature plate. The flow channel stamping plate is fixed to the module temperature plate, and a flow channel for the circulation of liquid cooling medium is formed inside. The module temperature plate is a flat plate, which is used to connect with the battery module through a heat conductive material to cool the battery cell; the flow channel stamping plate is formed by stamping a flat plate, and the surface is stamped to form a flow channel of the desired shape; the surface of the liquid cooling plate is provided with a liquid inlet interface and a liquid outlet interface near the front end, characterized in that The flow channel includes a first flow channel and a second flow channel, the first flow channel is a parallel flow channel, the second flow channel is a series flow channel, the first flow channel is connected to the liquid inlet interface, the second flow channel is connected to the liquid outlet interface, and the first flow channel and the second flow channel are connected near the rear end side of the liquid cooling plate; a swirling turbulent flow structure composed of staggered first ribs and second ribs is arranged in the second flow channel; the swirling turbulent flow structure is divided into multiple groups, which are arranged in the second flow channel at intervals along the flow direction of the cooling medium.
2. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: There are at least two groups of the first flow channels, each of which is independent and arranged in parallel; each group of the first flow channels includes a plurality of ribs arranged along the length of the liquid cooling plate and parallel to each other, and the liquid cooling medium flows along a serpentine trajectory in the flow channels on both sides of the ribs and finally flows into the second flow channel.
3. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: Each group of swirling turbulent structures is composed of a plurality of parallel and spaced first ribs and a plurality of parallel and spaced second ribs. The length directions of the first ribs and the second ribs are parallel to the length direction of the liquid cooling plate. The first ribs are spaced and arranged in the downstream direction of the second ribs. The number of the first ribs is greater than the number of the second ribs. Two adjacent spaced first ribs are symmetrically arranged in the axial direction of one of the second ribs.
4. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: A false flow channel is arranged near the front end of the upper surface of the liquid cooling plate.
5. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: A plurality of spaced apart fixing holes are arranged near the periphery of the surface of the liquid cooling plate and along the periphery of the liquid cooling plate, for fixing the liquid cooling plate to the battery system box.
6. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate is provided with module crossbeam fixing holes, which are designed in a regionalized manner and are arranged in three positions: the middle area, the front area, and the rear area of the liquid cooling plate.
7. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: The flow channel stamping plate is welded and fixed to the module temperature uniform plate, and a seal is formed at the welding position.
8. The battery system box energy storage liquid cooling plate according to claim 1, characterized in that: The flow channel stamping plate and the module temperature uniform plate are made of aluminum plates.
9. Battery system box, characterized in that, Comprising the battery system box energy storage liquid cooling plate according to any one of claims 1-8.
10. A battery system, characterized in that Including the battery system box as claimed in claim 9.