Cylindrical battery efficient water cooling system and battery PACK thereof

Abstract

The utility model discloses a cylindrical battery efficient water cooling system and a battery PACK thereof, and belongs to the technical field of batteries, the cylindrical battery efficient water cooling system comprises batteries and water cooling plates, the batteries are arranged in a staggered mode, and the water cooling plates are attached to the two sides of the batteries; the water cooling plate comprises collector plates arranged at the two ends of the water cooling plate; the pipeline assembly is arranged on the collector plate; the pipeline assembly is provided with a liquid inlet and outlet and connected with a water cooling medium. The collector plate, the pipeline assembly and the water-cooling plate are internally communicated, and a water-cooling medium circulates; a through hole is formed in the collector plate; notches are formed in the ends, away from the through holes, of the collector plates; the flowing directions of water cooling media in the adjacent water cooling plates are opposite. The beneficial effects of the utility model are that: (1) the heat dissipation of the battery is efficient, and the problem that the heat dissipation difficulty of the high-rate charge and discharge battery is large is solved; (2) a cold plate parallel connection and bidirectional convection structure is adopted, so that the service life of the battery is balanced; and (3) the current collecting plate is provided with the gap and avoids the pipeline, so that the volume of the battery PACK is reduced, and the battery PACK is more convenient to use, store and transport.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a high-efficiency water cooling system for cylindrical batteries and its battery PACK. Background Art

[0002] Cylindrical batteries are batteries with high capacity, long cycle life, and wide operating temperature range. The products are applied to power grid frequency modulation energy storage systems, centralized energy storage power stations, industrial and commercial energy storage systems, etc. With the wide application of cylindrical batteries, the water cooling demand for cylindrical batteries is increasing. An efficient water cooling system can achieve good cooling of the batteries, extend the service life of cylindrical batteries, and has broad market prospects and wide application fields.

[0003] However, the existing water cooling systems have the following defects: The cooling effect of the existing air-cooled structure water cooling system is poor, and it is not suitable for high-power charging and discharging forms; The cooling effect of the bottom water cooling plate of the existing water cooling plate water cooling system is acceptable, but still not ideal enough, and the battery heat dissipation area is at one end of the battery, resulting in poor heat dissipation balance; The flow path of the vertical through-type water cooling plate is long, the fluid pressure drop between the front and the back is large, and there are obvious differences in the cooling effects of the front and back batteries. The front end has a good cooling effect, while the back end has a poor cooling effect, and the service life of the batteries is uneven. Summary of the Invention

[0004] The purpose of the present application is to provide a water cooling system and its battery PACK that can at least solve one of the defects in the above background art.

[0005] To achieve the above objectives, the present application provides an efficient water-cooling system for cylindrical batteries, which includes batteries and water-cooling plates. The batteries are arranged in a staggered manner, and the water-cooling plates are attached to both sides of the batteries. The water-cooling plates include: a current collector plate, which is arranged at both ends of the water-cooling plate; the current collector plate is internally connected to the water-cooling plate and water-cooling medium flows through it, which is used to cool the batteries; and a pipeline assembly, which is arranged on the current collector plate; the pipeline assembly is provided with a liquid inlet and a liquid outlet and is connected to the water-cooling medium; the pipeline assembly is internally connected to the current collector plate, so that the water-cooling medium enters from the liquid inlet of the pipeline assembly and is discharged from the liquid outlet of the pipeline assembly after passing through the water-cooling plate; through holes are provided on the current collector plate, which are suitable for connecting the pipeline assembly; a notch is provided at one end of the current collector plate away from the through hole, which is used to avoid the pipeline assembly; the flowing directions of the water-cooling medium in adjacent water-cooling plates are opposite, so as to evenly cool the batteries at both ends. The efficient water-cooling system for cylindrical batteries adopts a two-way convection combined water-cooling plate, which is inserted into the battery monomers. The batteries are arranged in a staggered manner, reducing the overall external dimension and facilitating the water-cooling plate to wrap the outer circle of the batteries. The water-cooling plates in each row are connected in parallel, and the flowing directions of the water-cooling medium in adjacent water-cooling plates are opposite and arranged in sequence to achieve uniform cooling between each row of batteries; the water flow directions of the water-cooling plates on both sides of each row of batteries are opposite to achieve uniform cooling of the batteries on the left and right sides in the same row, realizing efficient water-cooling, being able to meet the high heat dissipation requirements and improve the service life of the system battery Pack. The current collector plate is provided with two channels to connect with the pipeline assembly, and one of the pipeline channels is connected to the through hole; a notch is provided on the current collector plate to avoid the pipeline, and the other pipeline channel is connected through the notch position, making the module size more compact, greatly reducing the space volume of the efficient water-cooling system for cylindrical batteries, and being more convenient for the use, storage and carrying of the water-cooling system.

[0006] Preferably, the pipeline assembly includes a connecting pipe and a connector. The connecting pipe is connected to the connector; the connector is connected to the water-cooling medium and is used for the entry and discharge of the water-cooling medium. Taking four current collector plates as a group, there are only two connectors, which are installed at the outermost ends of the connecting pipes, respectively arranged at the upper and lower endpoints of the two connecting pipes. One connector is used for the entry of the water-cooling medium to introduce it into the interior of the water-cooling plate; one connector is used for the discharge of the water-cooling medium to discharge the water-cooling medium in the water-cooling plate.

[0007] Preferably, the water-cooling plate further includes a corrugated plate, which is arranged between the two current collector plates. The corrugated plate is periodically bent and is suitable for fitting the battery to fix the position of the battery. The corrugated plate has one concave side and one convex side as a cycle, and the cycle is set in a loop. If one side is concave, the other side is convex; the batteries are all embedded in the concave parts of the corrugated plate and are fixed in fit with the batteries, and this is repeated in a loop.

[0008] Preferably, a cavity is provided inside the current collector plate for the circulation of the water-cooling medium; a notch is provided on one side of the current collector plate close to the corrugated plate for the circulation between the current collector plate and the corrugated plate. The current collector plate is relatively thin, and its internal cavity can allow the circulation of the water-cooling medium; the other sides of the current collector plate are all closed, and only a notch on one side is left to connect with the corrugated plate. After the water-cooling medium enters from the liquid inlet of the connector of the pipeline assembly, it enters the corrugated plate through the notch of the current collector plate, thereby reducing the battery temperature; after passing through the corrugated plate, the water-cooling medium enters from the notch of the other end current collector plate, and then is discharged through the liquid outlet of the pipeline assembly, realizing the cyclic reciprocation of water cooling.

[0009] Preferably, one current collector plate is connected to two connecting pipes. The connector connected to the upper end of the current collector plate is the liquid inlet, and the connector connected to the lower end of the current collector plate is the liquid outlet. When the high-efficiency water-cooling system for cylindrical batteries is placed flat on the operation plane, the internal water-cooling medium sinks under the action of gravity. Therefore, the liquid inlet is placed on the upper pipeline, and the liquid outlet is placed on the lower pipeline; when the water-cooling medium enters from the upper pipeline, it freely sinks and then is discharged through the lower pipeline at the other end.

[0010] Preferably, the pipeline assembly further includes a total liquid inlet pipe and a total liquid outlet pipe. The total liquid inlet pipe is connected to the liquid inlet of the connector, and the total liquid outlet pipe is connected to the liquid outlet of the connector. Taking four water-cooling plates as a group, each group of water-cooling plates has only one liquid inlet and one liquid outlet. The total liquid inlet pipe and the total liquid outlet pipe connect the liquid inlets and liquid outlets of each group and are jointly connected to the water-cooling medium.

[0011] The present application provides a battery PACK, which includes a wire connection row and a bus bar. Both the wire connection row and the bus bar are installed on the high-efficiency water-cooling system for cylindrical batteries; the wire connection row is connected to the battery for connecting the current path; the bus bar is connected to the battery for collecting and distributing electric energy. The wire connection row can connect multiple separately arranged batteries to form a current path; the bus bar is a relay station used to collect all resources and transmit them. It can be called a bus. The bus can serve multiple components and is used to connect multiple electrical circuits, which can play the role of collecting and distributing electric energy.

[0012] Preferably, it further includes a top frame and a bottom frame. The top frame and the bottom frame are arranged at intervals, and the high-efficiency water-cooling system for cylindrical batteries is installed between the top frame and the bottom frame. The top frame and the bottom frame fix the position of the high-efficiency water-cooling system for cylindrical batteries and can provide support for the pipeline laying of the pipeline assembly.

[0013] Preferably, it further includes a wiring board which is installed on the top frame and used for distributing and fixing the measurement and control line circuits. The wiring board, also known as a rubber wire groove board, is a security product for temporary lines and pipelines and belongs to rubber products. Its function is to lay the exposed cables, wires or other pipelines in the inner groove, providing a continuous and safe crossing channel to avoid various safety hazards caused by their direct exposure.

[0014] Preferably, it further includes a bracket and a housing. The cylindrical battery high-efficiency water cooling system, the top frame, the bottom frame and the bracket are all installed in the housing; the bracket is connected between the top frame and the bottom frame and is used for fixing the top frame and the bottom frame. The cylindrical battery high-efficiency water cooling system and the components of the battery PACK are fixed and combined through the housing and the bracket, and are placed through the housing, which is convenient for carrying and protecting the structure.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows:

[0016] (1) The battery has high-efficiency heat dissipation, solves the problem of difficult heat dissipation of high-rate charge and discharge batteries, can better achieve the temperature drop of the battery, and is beneficial to the thermal management of the battery;

[0017] (2) The present application adopts a structure with parallel cold plates and two-way convection, which can better balance the heat dissipation of the battery, achieve balanced battery life, and thus improve the service life of the entire system;

[0018] (3) Notches are provided on the current collector plate and the pipelines are avoided, making the module size more compact, reducing the volume of the battery PACK, and being more convenient for use, storage and carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the battery PACK in the first embodiment of the present invention.

[0020] Figure 2 It is a schematic structural diagram of the water cooling system in the first embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the water cooling plate in the first embodiment of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the current collector plate in the first embodiment of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the connector in the first embodiment of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the connecting pipe in the first embodiment of the present invention.

[0025] Figure 7This is a schematic structural view of the mounting bracket in the first embodiment of the present utility model.

[0026] Figure 8 This is a schematic structural view of the module in the first embodiment of the present utility model.

[0027] Figure 9 This is a schematic structural view of the module assembly in the first embodiment of the present utility model.

[0028] In the figure: 1, water-cooled plate; 2, battery; 3, housing; 4, electrical fittings; 5, top bracket; 6, bottom bracket; 7, wire connection row; 8, busbar; 9, wiring board; 10, bracket; 11, current collector plate; 12, pipeline assembly; 13, corrugated plate; 111, through hole; 112, notch; 113, slot; 121, connector; 122, connecting pipe. Detailed implementation manners

[0029] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0030] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0032] The terms "comprising" and "having" in the description and claims of the present application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0033] For the convenience of understanding, the following can be illustrated through specific embodiments. It should be known that the specific structure of the high-efficiency water-cooling system for cylindrical batteries 2 and its battery PACK includes but is not limited to the following embodiments.

[0034] Embodiment 1:

[0035] The present application provides a battery PACK, as Figure 1 shown, the wire connection row 7 and the busbar 8 are connected. Both the wire connection row 7 and the busbar 8 are installed on the high-efficiency water-cooling system of the cylindrical battery 2; the wire connection row 7 is connected to the battery 2 for connecting the current path; the busbar 8 is connected to the battery 2 for collecting and distributing electric energy. The wire connection row 7 can connect multiple separately arranged batteries 2 to form a current path; the busbar is a relay station used to collect all resources and transmit them, which can be called a bus. The bus can serve multiple components and is used to connect multiple electrical circuits, playing the role of collecting and distributing electric energy.

[0036] The specific structural features of each component will be described below.

[0037] The present application provides a high-efficiency water-cooling system for a cylindrical battery 2, as Figure 2 、 Figure 3As shown, it includes a battery 2 and a water-cooling plate 1. The batteries 2 are arranged in a staggered manner, and the water-cooling plates 1 are disposed on both sides of the batteries 2 in a fitting manner. The water-cooling plate 1 includes: a current collector plate 11, which is arranged at both ends of the water-cooling plate 1; the current collector plate 11 is internally connected to the water-cooling plate 1 and water-cooling medium flows through it, for cooling the battery 2; and a pipeline assembly 12, which is arranged on the current collector plate 11; the pipeline assembly 12 is provided with a liquid inlet and a liquid outlet and is connected to the water-cooling medium; the pipeline assembly 12 is internally connected to the current collector plate 11, so that the water-cooling medium enters from the liquid inlet of the pipeline assembly 12, passes through the water-cooling plate 1, and then discharges from the liquid outlet of the pipeline assembly 12; through holes 111 are provided on the current collector plate 11, which are suitable for connecting the pipeline assembly 12; a notch 112 is provided at one end of the current collector plate 11 away from the through hole 111, for avoiding the pipeline assembly 12; the flowing directions of the water-cooling medium in adjacent water-cooling plates 1 are opposite, so as to evenly cool the batteries 2 at both ends. The high-efficiency water-cooling system for cylindrical batteries 2 adopts a water-cooling plate 1 with a two-way convection combination type, which is inserted into the interior of the battery 2 monomers. The batteries 2 are arranged in a staggered manner, reducing the overall external dimension and facilitating the water-cooling plate 1 to wrap the outer circumference of the battery 2. Each row of water-cooling plates 1 is connected in parallel, and the flowing directions of the water-cooling medium in adjacent water-cooling plates 1 are opposite and arranged in sequence, so as to achieve uniform cooling between each row of batteries 2; the water flow directions of the water-cooling plates 1 on both sides of each row of batteries 2 are opposite, so as to achieve uniform cooling of the batteries 2 on the left and right sides between the same row, realizing high-efficiency water-cooling, being able to meet high heat dissipation requirements and improving the service life of the system battery Pack. The current collector plate 11 is provided with two channels for connecting the pipeline assembly 12, and one of the pipeline channels is connected to the through hole 111; a notch 112 is provided on the current collector plate 11 to avoid the pipeline, and the other pipeline channel is connected through the position of the notch 112, making the module size more compact, greatly reducing the space volume of the high-efficiency water-cooling system for cylindrical batteries 2, and being more convenient for the use, storage and carrying of the water-cooling system. The water-cooling plate 1 further includes a corrugated plate, which is arranged between the two current collector plates 11. The corrugated plate is periodically bent and is suitable for fitting the battery 2, for fixing the position of the battery 2. The corrugated plate has one concave side and one convex side as a cycle, and is cyclically arranged. If one side is concave, the other side is convex; the batteries 2 are all embedded in the concave parts of the corrugated plate and are fixedly fitted with the battery 2, and this is repeated in a cycle. One current collector plate 11 is connected to two connecting pipes 122. The connecting head 121 connected to the upper end of the current collector plate 11 is the liquid inlet, and the connecting head 121 connected to the lower end of the current collector plate 11 is the liquid outlet. When the high-efficiency water-cooling system for cylindrical batteries 2 is placed flat on the operation plane, the internal water-cooling medium sinks under the action of gravity. Therefore, the liquid inlet is placed on the upper pipeline, and the liquid outlet is placed on the lower pipeline; when the water-cooling medium enters from the upper pipeline, it freely sinks and then discharges through the lower pipeline at the other end. The pipeline assembly 12 further includes a total liquid inlet pipe and a total liquid outlet pipe. The total liquid inlet pipe is connected to the liquid inlet of the connecting head 121, and the total liquid outlet pipe is connected to the liquid outlet of the connecting head 121.Taking four water-cooling plates 1 as a group, each group of water-cooling plates 1 has only one liquid inlet and one liquid outlet. The main liquid inlet pipe and the main liquid outlet pipe connect the liquid inlets and outlets of each group together and are jointly connected to the water-cooling medium.

[0038] As Figure 4 shown, a cavity is provided inside the manifold plate 11 for the circulation of the water-cooling medium; a notch 113 is provided on the side of the manifold plate 11 close to the corrugated plate for the circulation between the manifold plate 11 and the corrugated plate. The manifold plate 11 is relatively thin, and its internal cavity allows the circulation of the water-cooling medium; the other sides of the manifold plate 11 are all closed, and only the notch 113 on one side is connected to the corrugated plate. After the water-cooling medium enters from the liquid inlet of the connector 121 of the pipeline assembly 12, it enters the corrugated plate through the notch 113 of the manifold plate 11, thereby reducing the temperature of the battery 2; after passing through the corrugated plate, the water-cooling medium enters from the notch 113 of the other end of the manifold plate 11, and then is discharged through the liquid outlet of the pipeline assembly 12, realizing the cyclic reciprocation of water-cooling.

[0039] As Figure 5 、 Figure 6 shown, the pipeline assembly 12 includes a connecting pipe 122 and a connector 121, and the connecting pipe 122 is connected to the connector 121; the connector 121 is connected to the water-cooling medium for the entry and discharge of the water-cooling medium. Taking four manifold plates 11 as a group, there are only two connectors 121, which are installed at the outermost ends of the connecting pipes 122 and are respectively arranged at the upper and lower endpoints of the two connecting pipes 122. One connector 121 is for the entry of the water-cooling medium, so as to introduce it into the water-cooling plate 1; one connector 121 is for the discharge of the water-cooling medium, so as to discharge the water-cooling medium in the water-cooling plate 1.

[0040] As Figure 7 shown, it further includes a top frame 5 and a bottom frame 6. The top frame 5 and the bottom frame 6 are arranged at intervals, and the high-efficiency water-cooling system for cylindrical batteries 2 is installed between the top frame 5 and the bottom frame 6. The top frame 5 and the bottom frame 6 fix the position of the high-efficiency water-cooling system for cylindrical batteries 2 and can provide support for the pipeline laying of the pipeline assembly 12.

[0041] As Figure 8 shown, it further includes a wiring board 9, which is installed on the top frame 5 for the distribution and fixation of the measurement and control line circuits. The wiring board 9 is also called a rubber wire groove board, which is a security product for providing temporary lines and pipelines and belongs to rubber products. Its function is to lay the exposed cables, wires or other pipelines in the inner groove, providing a continuous and safe crossing channel to avoid various safety hazards caused by their direct exposure.

[0042] As Figure 9As shown, it further includes a bracket 10 and a housing 3. The high-efficiency water cooling system for cylindrical batteries 2, a top bracket 5, a bottom bracket 6, and the bracket 10 are all installed inside the housing 3; the bracket 10 is connected between the top bracket 5 and the bottom bracket 6 for fixing the top bracket 5 and the bottom bracket 6. The high-efficiency water cooling system for cylindrical batteries 2 and the components of the battery PACK are fixedly combined through the housing 3 and the bracket 10, and are placed through the housing 3, which is convenient for carrying and protecting the structure.

[0043] The foregoing has described the basic principles, main features, and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. An efficient water cooling system for cylindrical batteries, comprising batteries and water cooling plates, wherein the batteries are arranged in a staggered manner, and the water cooling plates are attached to both sides of the batteries; characterized in that, The water-cooling plate includes: A current collector plate disposed at both ends of the water-cooling plate; the current collector plate is internally connected to the water-cooling plate and water-cooling medium flows through it for cooling the battery; and A pipeline assembly disposed on the current collector plate; the pipeline assembly is provided with a liquid inlet and a liquid outlet and is connected to the water-cooling medium; the pipeline assembly is internally connected to the current collector plate, so that the water-cooling medium enters from the liquid inlet of the pipeline assembly, passes through the water-cooling plate, and then discharges from the liquid outlet of the pipeline assembly; The current collector plate is provided with through holes suitable for connecting the pipeline assembly; a notch is provided at one end of the current collector plate away from the through holes for avoiding the pipeline assembly; the flowing directions of the water-cooling medium in adjacent water-cooling plates are opposite, so as to evenly cool the batteries at both ends.

2. The high-efficiency water cooling system for cylindrical batteries according to claim 1, wherein The pipeline assembly includes a connecting pipe and a connector; the connecting pipe is connected to the connector; the connector is connected to the water-cooling medium for the entry and discharge of the water-cooling medium.

3. The high-efficiency water cooling system for cylindrical batteries according to claim 1, characterized in that, The water-cooling plate further includes a corrugated plate disposed between the two current collector plates; the corrugated plate is periodically bent and is suitable for fitting the battery to fix the position of the battery.

4. The high-efficiency water cooling system for cylindrical batteries according to claim 3, characterized in that, A cavity is provided inside the current collector plate for the flow of the water-cooling medium; a notch is provided on one side of the current collector plate close to the corrugated plate for the flow between the current collector plate and the corrugated plate.

5. The high-efficiency water cooling system for cylindrical batteries according to claim 2, wherein One current collector plate is connected to two connecting pipes; the connector connected to the upper end of the current collector plate is the liquid inlet, and the connector connected to the lower end of the current collector plate is the liquid outlet.

6. The high-efficiency water cooling system for cylindrical batteries according to claim 1, wherein, The pipeline assembly further includes a total liquid inlet pipe and a total liquid outlet pipe; the total liquid inlet pipe is connected to the liquid inlet of the connector, and the total liquid outlet pipe is connected to the liquid outlet of the connector.

7. A battery PACK, applicable to any cylindrical battery high-efficiency water cooling system as described in claims 1-6, characterized in that, It includes a wire connection row and a busbar; both the wire connection row and the busbar are installed on the high-efficiency water-cooling system for cylindrical batteries; the wire connection row is connected to the battery for connecting the current path; the busbar is connected to the battery for collecting and distributing electric energy.

8. The battery PACK according to claim 7, characterized in that, It further includes a top frame and a bottom frame; the top frame and the bottom frame are spaced apart, and the high-efficiency water-cooling system for cylindrical batteries is installed between the top frame and the bottom frame.

9. The battery PACK according to claim 8, wherein, It further includes a wiring board installed on the top frame for the distribution and fixation of the measurement and control line.

10. The battery PACK according to claim 8, wherein, It further includes a bracket and a housing; the high-efficiency water-cooling system for cylindrical batteries, the top frame, the bottom frame and the bracket are all installed inside the housing; the bracket is connected between the top frame and the bottom frame for fixing the top frame and the bottom frame.

Images