Energy storage equipment

Abstract

The utility model belongs to the field of batteries, and particularly relates to energy storage equipment, which solves the problem that the batteries in the existing energy storage equipment have potential safety hazards, and comprises a temperature control system and a battery cluster, the battery cluster comprises high-capacity batteries; the high-capacity battery comprises a shell and single batteries arranged in the shell; the shell is provided with a shared cavity communicated with all the single batteries; an avoiding hole is formed in the top plate of the shell; the polar terminal of each single battery extends out of the corresponding avoiding hole; channels penetrating through the polar terminals are formed in the parts, extending out of the corresponding avoiding holes, of the polar terminals, the channels, located on the polar terminals on the same side, of the adjacent single batteries are communicated with each other, and two heat exchange channels are formed in the top of the large-capacity battery; the temperature control system comprises a heat conveying unit and a heat processing unit; the heat conveying unit is used for conveying a heat transfer medium between each heat exchange channel and the heat treatment unit; and the heat treatment unit is used for heating or cooling the heat transfer medium conveyed by the heat conveying unit.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, and in particular relates to an energy storage device. Background Art

[0002] With the development of new energy sources such as solar energy and wind energy, energy storage technology has also developed. Due to the advantages of lithium batteries such as high energy, long service life, high rated voltage, high power tolerance and low self-discharge rate, they have gradually become the mainstream product of energy storage.

[0003] With the widespread adoption of lithium-ion battery energy storage devices, the safe use of lithium-ion batteries has also attracted attention. Due to the high concentration of individual cells in energy storage devices, a large amount of heat is generated during the charging and discharging process. This heat gradually accumulates, causing uneven battery temperatures. In severe cases, the battery's thermal balance is disrupted, leading to thermal runaway, posing a safety hazard. Summary of the Invention

[0004] The purpose of the utility model is to provide an energy storage device to solve the problem of potential safety hazards of batteries in existing energy storage devices.

[0005] The technical solution of the utility model is to provide an energy storage device, including a temperature control system and at least one battery cluster;

[0006] Each battery cluster includes at least one battery pack, and each battery pack includes at least one large-capacity battery;

[0007] The high-capacity battery includes a housing and multiple single cells. The multiple single cells are arranged in the x-direction within the housing cavity. The housing has at least one shared chamber that is interconnected with the inner chambers of all the single cells. A relief hole is provided on the top plate of the housing corresponding to the polarity terminals of each single cell. Each single cell polarity terminal extends out of the corresponding relief hole, and the region of the housing top plate corresponding to the relief hole is fixedly sealed to the housing of the single cell. A channel is provided at the portion of each polarity terminal extending out of the corresponding relief hole, penetrating the polarity terminal. The channels on the polarity terminals of adjacent single cells on the same side are interconnected, forming two heat exchange channels on the top of the high-capacity battery.

[0008] The temperature control system includes a heat transfer unit and a heat treatment unit; the heat transfer unit is used to realize the transportation of heat transfer medium between each heat exchange channel and the heat treatment unit; the heat treatment unit is used to increase or decrease the temperature of the heat transfer medium transported by the heat transfer unit.

[0009] The utility model discloses energy storage equipment includes multiple large capacity batteries, and each large capacity battery includes large capacity battery and heat exchange device, and each large capacity battery is by multiple monomer batteries and a shell with shared chamber constitutes, and multiple monomer batteries are placed in the shell, utilizes the shared chamber and the cavity of each monomer battery in the shell through, reduces the difference between each monomer battery, and the consistency between each monomer battery is promoted to a certain extent, thereby the cycle life of large capacity battery is promoted to a certain extent.

[0010] The utility model discloses the channel on polarity terminal is set up, as heat exchange medium flow channel, that is, the partial structure (channel inner wall) of polarity terminal and heat exchange medium direct contact, the channel of each monomer battery is located the same side intercommunication, forms two heat exchange channels at large capacity battery top, and two heat exchange channels can adopt the way of parallel connection or series connection and connect, and the heat exchange of large capacity battery is realized based on two heat exchange channels. Relative to the scheme of using indirect heat exchange (such as the scheme of Chinese patent CN118299714A discloses), first, the heat exchange path is shortened, and the heat exchange path is shortened as " heat exchange medium - heat exchange piece - polarity terminal " for " heat exchange medium - polarity terminal ", and heat exchange medium directly acts on polarity terminal, can improve the utilization efficiency of heat exchange medium, and then improve the heat exchange efficiency of this kind of large capacity battery, in addition, because of using direct heat exchange mode, has good heat exchange effect, therefore, the cross section area of channel does not need too big, does not affect the conductivity of polarity terminal.

[0011] In addition, the energy storage equipment also has a temperature control system, which is directly connected with the heat exchange channel of the large capacity battery, controls the temperature of the large capacity battery during operation, avoids the safety hazard of the large capacity battery, and improves the use safety of the energy storage equipment.

[0012] Further, the inner wall of the channel is provided with a partition rib plate for increasing the heat exchange area. By arranging the partition rib plate in the channel, the contact area between the heat exchange medium and the polarity terminal can be increased, thereby increasing the heat exchange area and further improving the heat exchange effect.

[0013] Further, the partition rib plate is in multiple, and the multiple partition rib plates are evenly distributed along the circumference of the channel, so that the temperature uniformity of each part of the polarity terminal is good, and each partition rib plate extends along the axial direction of the channel without affecting the flowability of the heat transfer medium in the channel.

[0014] Further, the large capacity battery further comprises a connecting pipe assembly; the connecting pipe assembly comprises a plurality of second sub connecting pipes; two ends of each second sub connecting pipe are respectively sealedly connected with channels on the same side of the polarity terminals of the adjacent single batteries, and two heat exchange channels are formed at the top of the large capacity battery. Heat exchange medium is introduced into the heat exchange channels to realize heat dissipation or heating of the large capacity battery; by controlling the temperature of the heat exchange medium, the large capacity battery can always operate at a normal working temperature. When a plurality of split rib plates extending along the axial direction of the channels are arranged in the channels, the end faces of the split rib plates are in abutment with the end faces of the second sub connecting pipes, and the second sub connecting pipes are positioned in the axial direction.

[0015] Further, the connecting pipe assembly further comprises a first sub connecting pipe; two ends of the first sub connecting pipe are respectively insulatedly and sealably connected with the channels on the two polarity terminals of the outermost single battery in the large capacity battery; the first sub connecting pipe is used to realize series connection of the two heat exchange channels.

[0016] Further, an insulating sealing adhesive layer is arranged on the top plate of the shell, the main part of the heat exchange channel is located in the insulating sealing adhesive layer, and the liquid inlet end and the liquid outlet end of the heat exchange channel extend out of the insulating sealing adhesive layer.

[0017] Further, the large capacity battery further comprises an electric connecting component assembly, the electric connecting component assembly is connected with the electric connection part of each polarity terminal, and the connection part of each polarity terminal of the electric connecting component assembly is located in the insulating sealing adhesive layer.

[0018] Further, in each battery cluster, a plurality of battery packs are arranged along the z direction, and in each battery pack, a plurality of large capacity batteries are arranged along the y direction.

[0019] The heat delivery unit comprises a liquid supply pipeline assembly, a liquid outlet pipeline assembly, a liquid inlet pipeline assembly and a liquid return pipeline assembly; the liquid supply pipeline assembly is used to deliver the heat transfer medium in the heat treatment unit to each battery cluster, and the liquid outlet pipeline assembly is used to converge the heat transfer medium after heat exchange with each battery cluster to the heat treatment unit;

[0020] The liquid inlet pipeline assembly and the liquid outlet pipeline assembly correspond to the battery clusters one by one; in each battery cluster, the liquid inlet pipeline assembly is used to divide the heat transfer medium in the liquid supply pipeline assembly into the heat exchange channels of the plurality of large capacity batteries; and the liquid return pipeline assembly is used to converge the heat transfer medium after heat exchange in the heat exchange channels of the plurality of large capacity batteries to the liquid outlet pipeline assembly.

[0021] Further, each liquid inlet pipeline assembly comprises a primary liquid inlet pipe, a plurality of secondary liquid inlet pipes and a plurality of tertiary liquid inlet pipes.

[0022] The liquid inlet of the primary liquid inlet pipe is used to be connected with the liquid supply pipeline assembly.

[0023] The secondary liquid inlet pipe corresponds to a battery pack in the battery cluster corresponding to the liquid inlet pipe assembly; each secondary liquid inlet pipe is connected with the primary liquid inlet pipe to divide the heat transfer medium in the primary liquid inlet pipe into the corresponding battery pack;

[0024] The tertiary liquid inlet pipe corresponds to a large-capacity battery in the battery cluster corresponding to the liquid inlet pipe assembly; for each battery pack, two ends of each tertiary liquid inlet pipe are respectively connected with the secondary liquid inlet pipe and the heat exchange channel of the corresponding large-capacity battery, and each tertiary liquid inlet pipe divides the heat transfer medium in the secondary liquid inlet pipe into the heat exchange channel of the corresponding large-capacity battery in the battery pack;

[0025] The liquid outlet pipe assembly includes a primary liquid outlet pipe, a plurality of secondary liquid outlet pipes, and a plurality of tertiary liquid outlet pipes;

[0026] The liquid outlet of the primary liquid outlet pipe is used to be connected with the liquid outlet pipe assembly;

[0027] The secondary liquid outlet pipe corresponds to a battery pack in the battery cluster; each secondary liquid outlet pipe is connected with the primary liquid outlet pipe to gather the heat transfer medium after heat exchange of the battery pack into the primary liquid outlet pipe;

[0028] The tertiary liquid outlet pipe corresponds to a large-capacity battery in the battery cluster; for each battery pack, two ends of each tertiary liquid outlet pipe are respectively connected with the secondary liquid outlet pipe corresponding to the battery pack and the heat exchange channel of the corresponding large-capacity battery, and used to gather the heat transfer medium after heat exchange with the large-capacity battery into the secondary liquid outlet pipe.

[0029] The liquid inlet pipe assembly and the liquid outlet pipe assembly are made of multi-stage pipes, so that the heat transfer medium flowing out of the liquid supply pipe assembly is divided and distributed to each battery module in stages, and the heat transfer medium flow distributed to each battery module is balanced, so that each battery module in the battery cluster has good and balanced heat dissipation effect, thereby improving the working stability and service life of each battery module.

[0030] Further, the battery cluster is a plurality of matrix arranged;

[0031] The liquid supply pipe assembly includes a primary distribution pipe, a secondary distribution pipe, and a tertiary distribution pipe; the inlet of the primary distribution pipe is used to be connected with the heat treatment unit; the secondary distribution pipe is used to divide the heat transfer medium in the primary distribution pipe into different columns or rows of battery clusters, and the tertiary distribution pipe is used to divide the heat transfer medium in the secondary distribution pipe into a plurality of battery clusters in the same column or row;

[0032] The liquid outlet pipe assembly includes a primary combination pipe, a secondary combination pipe, and a tertiary combination pipe; the tertiary combination pipe is used to gather the heat transfer medium of a plurality of battery clusters in the same column or row into the secondary combination pipe; the secondary combination pipe is used to gather the heat transfer medium of different columns or rows of battery clusters into the primary combination pipe; and the outlet of the primary combination pipe is used to be connected with the heat treatment unit.

[0033] The liquid supply pipeline assembly and the liquid outlet pipeline assembly are made of multi-stage pipelines, so that the heat transfer medium flowing out of the heat treatment unit is distributed step by step and evenly to each battery cluster, and the flow of the heat transfer medium distributed to each battery cluster is balanced, so that each battery cluster and each battery module in the battery cluster has good and balanced heat dissipation effect, thereby improving the working stability and service life of the energy storage equipment.

[0034] Further, at least part of the pipelines of the liquid supply pipeline assembly, the liquid outlet pipeline assembly, the liquid inlet pipeline assembly and the liquid return pipeline assembly are provided with a heat preservation layer, which can effectively prevent the loss of cold or heat of the heat transfer medium and reduce energy consumption, and can also avoid condensation on the walls of the pipelines. The secondary liquid inlet pipeline and the secondary liquid outlet pipeline are formed by splicing multiple sections of pipelines, which reduces the error and assembly difficulty when the secondary liquid inlet pipeline and the secondary liquid outlet pipeline are connected. At the same time, when the spliced pipeline is maintained, only the pipeline connector of the related battery module needs to be removed for maintenance, without the need to remove the entire temperature control pipeline assembly, so that the installation and maintenance are very convenient. The liquid supply pipeline assembly is provided with a water supplement connector for supplementing the heat transfer medium of the temperature control system, and the liquid outlet pipeline assembly is provided with an exhaust valve. The exhaust valve is used for exhausting air in the temperature control system, and the water supplement connector and the exhaust valve work together to efficiently control the temperature of each battery module and improve the temperature control effect of the temperature control system.

[0035] The utility model has the advantages of:

[0036] The energy storage equipment includes a plurality of large-capacity batteries, each large-capacity battery includes a large-capacity battery and a heat exchange device, each large-capacity battery is composed of a plurality of single batteries and a shell with a shared chamber, the plurality of single batteries are placed in the shell, the shared chamber and the inner cavities of the single batteries in the shell are connected, the differences between the single batteries are reduced, the consistency between the single batteries is improved to a certain extent, and the cycle life of the large-capacity battery is improved to a certain extent.

[0037] Meanwhile, the utility model discloses on the polarity terminal and set up the passage, as heat exchange medium flow passage, that is, the partial structure (passage inner wall) of polarity terminal and heat exchange medium direct contact, the passage of each monomer battery is located the same side intercommunication, forms two heat exchange passages at the top of large capacity battery, and two heat exchange passages can adopt the way of parallel connection or series connection and connect, and based on two heat exchange passages realize the heat exchange of large capacity battery. Relative to the scheme of using indirect heat exchange (such as the scheme of Chinese patent CN118299714A), first, shorten the heat exchange path, and the heat exchange path is shortened from " heat exchange medium-heat exchange piece-polarity terminal " to " heat exchange medium-polarity terminal ", and the heat exchange medium directly acts on the polarity terminal, can improve the utilization efficiency of heat exchange medium, and then improve the heat exchange efficiency of this kind of large capacity battery, in addition, since using direct heat exchange mode, has good heat exchange effect, therefore, the cross section area of passage does not need too big, does not affect the conductivity of polarity terminal.

[0038] In addition, the energy storage device also has a temperature control system, which is directly connected with the heat exchange channel of the large capacity battery, controls the temperature of the large capacity battery during operation, avoids safety hazards of the large capacity battery, and improves the use safety of the energy storage device. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is energy storage device structure schematic view;

[0040] Figure 2 It is battery pack structure schematic view;

[0041] Figure 3 It is large capacity battery structure schematic view in embodiment 1;

[0042] Figure 4 It is large capacity battery sectional view in embodiment 1;

[0043] Figure 5 It is one monomer battery structure schematic view in embodiment 1;

[0044] Figure 6 It is one upper cover assembly structure schematic view in embodiment 1;

[0045] Figure 7 It is one upper cover assembly sectional view in embodiment 1;

[0046] Figure 8 It is another monomer battery structure schematic view in embodiment 1;

[0047] Figure 9 It is another upper cover assembly structure schematic view in embodiment 1;

[0048] Figure 10 It is one large capacity battery partial sectional view in embodiment 1;

[0049] Figure 11 Structure diagram of the large capacity battery in Example 2;

[0050] Figure 12 Structure diagram of the large capacity battery in Example 2;

[0051] Figure 13 Structure diagram of the large capacity battery in Example 2;

[0052] Figure 14 Structure diagram of the large capacity battery in Example 2;

[0053] Figure 15 Structure diagram of the large capacity battery in Example 2;

[0054] Figure 16 Structure diagram of the large capacity battery in Example 2;

[0055] Figure 17 Structure diagram of the large capacity battery in Example 2;

[0056] Figure 18 Structure diagram of the large capacity battery in Example 2;

[0057] Figure 19 Structure diagram of the large capacity battery in Example 2; Figure 1

[0058] Figure 20 Structure diagram of the large capacity battery in Example 2;

[0059] Figure 21 Structure diagram of the large capacity battery in Example 2; Figure 2

[0060] Figure 22 Structure diagram of the large capacity battery in Example 2; Figure 1

[0061] Structure diagram of the large capacity battery in Example 2; Figure 23 Figure 2

[0062]

[0063] ​​​​​1, housing; 11, housing top plate; 12, housing bottom plate; 13, outer cylinder; 131, outer cylinder side plate; 132, outer cylinder top plate; 14, end plate; 15, sealing connector; 20, single battery; 21, polarity terminal; 211, electrical connection part; 220, channel; 24, upper cover plate; 25, partitioning rib plate; 27, lower cover plate; 28, opening piece; 3, connecting pipe assembly; 31, first sub connecting pipe; 32, second sub connecting pipe; 33, third sub connecting pipe; 4, electrolyte sharing chamber; 5, gas sharing chamber; 6, avoiding hole; 7, insulating sealing adhesive layer; 9, support; 10, boss;

[0064] 2, temperature control system; 22, heat delivery unit; 23, heat treatment unit; 231, liquid inlet pipeline assembly; 2311, first stage liquid inlet pipe; 2312, second stage liquid inlet pipe; 2313, third stage liquid inlet pipe; 232, liquid return pipeline assembly; 2321, first stage liquid outlet pipe; 2322, second stage liquid outlet pipe; 2323, third stage liquid outlet pipe; 236, quick plug; 235, hose; 233, liquid supply pipeline assembly; 2331, first stage shunt pipe; 2332, second stage shunt pipe; 2333, third stage shunt pipe; 234, liquid outlet pipeline assembly; 2341, first stage confluence pipe; 2342, second stage confluence pipe; 2343, third stage confluence pipe; 241, temperature control machine; 2411, liquid inlet; 2412, liquid outlet; 44, blocking joint; 441, joint end pipe; 442, regulating valve; 443, welding chuck; 242, radiator; 243, control valve;

[0065] 61, battery pack; 62, large capacity battery; 64, insulating protective cover. DETAILED DESCRIPTION

[0066] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail in the following with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the protection scope of the present application.

[0067] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific details set forth herein, having regard to the content of the present application, and it can be apparent to those skilled in the art that similar implementations can be achieved without departing from the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0068] In the description of the utility model, it is necessary to explain that the position or position relation of the terms such as top, bottom indicates the position or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not for indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0069] As shown in Figure 1 and Figure 2 The utility model discloses a kind of energy storage equipment, including temperature control system 2 and at least one battery cluster.

[0070] Battery cluster includes at least one battery pack 61, and each battery pack 61 includes at least one large-capacity battery 62.

[0071] As shown in Figure 3 and Figure 4 Large-capacity battery 62 includes shell 1 and multiple single batteries 20;Multiple single batteries 20 are placed in the cavity of shell 1 along the same direction.

[0072] Rectangular shell 1 is generally used, for the convenience of description, the length direction of shell 1 is defined as x direction, the width direction of shell 1 is defined as y direction, and the height direction of shell 1 is defined as z direction.

[0073] The utility model does not make specific limitation to shell 1 structure, and at least the following two structures can be used:

[0074] The first structure includes cylinder (i.e. the port parallel to yz plane is open end) with two open ends and end plate (i.e. end plate is parallel to yz plane) fixed at two open ends of cylinder respectively;

[0075] The second structure includes cylinder (i.e. the port parallel to xy plane is open end) with top and bottom open ends and top plate and bottom plate (i.e. top plate and bottom plate are parallel to xy plane, wherein bottom plate can be integrated with cylinder) fixed at top and bottom open ends of cylinder respectively;

[0076] Shared chamber is arranged in the above-mentioned shell 1.

[0077] It should be noted that:

[0078] The shared chamber can be an electrolyte shared chamber 4, the inner cavity of the electrolyte shared chamber 4 and the inner cavities of the single batteries 20 are communicated, and the single batteries 20 can be in a unified electrolyte environment through the electrolyte shared chamber 4, so that the uniformity of the electrolyte in the single batteries 20 is ensured, and the performance and the charge-discharge cycle life of the large-capacity battery 62 are improved. The electrolyte shared chamber 4 described herein is a liquid channel extending along the length direction of the shell 1 between the shell bottom plate 12 and the single batteries 20. The liquid channel can be integrally formed with the shell bottom plate 12, or can be formed by arranging a support 9 between the single battery 20 lower cover plate 27 and the shell bottom plate 12. It should be noted that in the shell 1 of the first structure, the shell bottom plate 12 herein is a cylinder bottom plate; in the shell 1 of the second structure, the shell bottom plate 12 herein is a bottom plate.

[0079] The shared chamber can also be a gas shared chamber 5 arranged on the shell top plate 11, and the gas shared chamber 5 covers the gas ports on the top of the single batteries 20 in the large-capacity battery 62.

[0080] It should be noted that in the shell 1 of the first structure, the shell top plate 11 herein is a cylinder top plate; in the shell 1 of the second structure, the shell top plate 11 herein is a top plate.

[0081] It should also be noted that the gas port includes the following two meanings:

[0082] 1) The gas port is a first through hole directly formed on the upper cover plate 24 of the single battery 20 and penetrating the inner cavity of the single battery 20;

[0083] At this time, the inner cavity of the gas shared chamber 5 is communicated with the gas area of the inner cavities of the single batteries 20 through the gas port, and the gas shared chamber 5 can communicate the gas areas of the single batteries 20, so as to achieve gas balance and make the single batteries 20 share gas to ensure the consistency of the single batteries 20, thereby improving the cycle life of the large-capacity battery 62 to a certain extent; when thermal runaway occurs in any single battery 20, the smoke in the inner cavity of the single battery 20 enters the gas shared chamber 5 and is discharged through the gas shared chamber 5, thereby improving the safety of the large-capacity battery 62.

[0084] 2) The gas port is a venting port or an explosion-proof port arranged on the upper cover plate 24 of the single battery 20, and a venting membrane is arranged at the venting port or the explosion-proof port;

[0085] At this time, the gas shared chamber 5 is used as a venting channel, and when the venting membrane at the gas port of any single battery 20 is broken by the smoke in the inner cavity, the inner cavity of the single battery 20 and the gas shared chamber 5 are communicated, and the smoke in the inner cavity is discharged through the gas shared chamber 5, thereby improving the safety of the large-capacity battery 62.

[0086] The shared chamber can also be a gas-liquid shared chamber, through which each single battery 20 is in a unified electrolyte environment and gas environment, thereby improving the performance and charge-discharge cycle life of the large-capacity battery 62.

[0087] In order to facilitate the electrical connection of such a large-capacity battery 62, a relief hole 6 is formed in the shell top plate 11 (in the first structure of the shell 1, the shell top plate 11 here is the cylinder top plate; in the second structure of the shell 1, the shell top plate 11 here is the top plate) corresponding to each single battery 20 polarity terminal 21; each single battery 20 polarity terminal 21 extends out of the corresponding relief hole 6 as the polarity terminal of the large-capacity battery 62, and the area of the shell top plate 11 corresponding to the relief hole 6 is fixedly sealed with the single battery 20 shell, so that the relief hole 6 part of the shell top plate 11 is sealed.

[0088] It should be noted that the single battery 20 polarity terminal 21 described here can be a single battery 20 pole, and if the single battery 20 pole cannot be smoothly extended out of the relief hole 6 or the height of the single battery 20 pole extended out of the relief hole 6 does not meet the set requirements, a pole adapter can also be connected to the single battery 20 pole, and the overall structure of the single battery 20 pole and the pole adapter is used as the single battery 20 polarity terminal 21.

[0089] In order to improve the heat exchange efficiency of the above-mentioned large-capacity battery, the utility model adopts the similar invention concept of Chinese patent CN118299714A, that is, mainly to the heat concentrated single battery polarity terminal for heat exchange, but different from Chinese patent CN118299714A, the utility model considers, through optimizing the heat exchange structure, adopts the direct heat exchange mode, makes the polarity terminal and the heat exchange medium direct contact, realizes the heat exchange of the polarity terminal, compared with the heat exchange medium through the heat exchange piece to the polarity terminal Indirect heat exchange effect, first, has shorter heat exchange path, can improve the utilization efficiency of heat exchange medium, second, has larger heat exchange area, improves the heat exchange efficiency, and further can improve the heat exchange efficiency of such large-capacity battery.

[0090] Based on the invention concept, the utility model opens the channel 220 that passes through the polarity terminal 21 on each polarity terminal 21, and directly uses the inner cavity of the channel 220 as the flow cavity of the heat exchange medium, so that the heat exchange medium directly contacts the polarity terminal 21, and the channels of each single battery located on the same side are connected with each other, forming two heat exchange channels at the top of the large-capacity battery. The two heat exchange channels can be connected in parallel or in series, and the heat exchange of the large-capacity battery is realized based on the two heat exchange channels.

[0091] The temperature control system 2 includes a heat delivery unit 22 and a heat treatment unit 23.

[0092] The heat transfer unit 22 is used to realize the transportation of heat transfer medium between the heat exchange device and the heat processing unit 23; the heat processing unit 23 is used to increase or decrease the temperature of the heat transfer medium transported by the heat transfer unit 22.

[0093] The specific structures of the large-capacity battery 62, the temperature control system 2 and the energy storage device are described in detail below with reference to the accompanying drawings and specific embodiments.

[0094] Example 1

[0095] This embodiment is a large-capacity battery. Figure 5 and Figure 6 They are respectively a structural schematic diagram and a cross-sectional view of the large-capacity battery of this embodiment.

[0096] As can be seen from the figure, the high-capacity battery 62 of this embodiment includes a housing 1 and a plurality of single cells 20 arranged within the housing 1 along the x-direction. In this embodiment, the single cells 20 are prismatic batteries, numbering twelve. Each single cell 20 has an internal cavity comprising an electrolyte region and a gas region. In other embodiments, the number of single cells 20 can be adjusted based on actual needs.

[0097] like Figure 7 As shown, the single cell 20 of this embodiment includes an outer shell and an electrode assembly and electrolyte located therein; the outer shell is enclosed by an outer cylinder, a lower cover assembly, and an upper cover assembly. The lower cover assembly of this embodiment includes a lower cover plate 27, and an opening member 28 may also be provided on the lower cover plate 27. This opening member 28 can be separated from the lower cover plate 27 of the single cell 20 under the action of external force or electrolyte, and forms a through hole in the lower cover plate 27 that penetrates the inner cavity of the outer shell. Through this through hole, the inner cavity of each single cell 20 is connected to the shared electrolyte chamber 4. The opening member 28 can be an existing structure, for example, the opening member 28 disclosed in Chinese Patent CN221327991 U, the sealing device disclosed in Chinese Patent CN117476997A, and the opening device disclosed in CN117477117A.

[0098] The upper cover assembly includes an upper cover plate 24 and two polarity terminals 21 located on the upper cover plate 24; the two polarity terminals 21 have opposite polarities and serve as positive and negative polarity terminals of the single battery 20 respectively;

[0099] It should be noted that insulation is maintained between the polarity terminal 21 and the upper cover plate 24 , and a method of maintaining insulation may be pouring insulating glue or providing an insulating rubber sleeve.

[0100] Combine Figure 8 and Figure 9It can be seen that the embodiment is provided with the channels 220 penetrating the polarity terminals 21 on both of the polarity terminals 21, and the inner cavities of the channels 220 are directly used as the flow cavities of the heat exchange medium, so that the heat exchange medium directly contacts with the polarity terminals 21, and the heat exchange efficiency is improved.

[0101] In the embodiment, the central axis of the channel 220 is parallel to the plane of the upper cover plate 24, and in some other embodiments, the extension line of the central axis of the channel 220 can have a certain included angle with the upper cover plate 24, and the included angle is not equal to 90°.

[0102] The shape of the polarity terminal 21 is not limited in the utility model, and the cross section of the polarity terminal 21 can be square, circular or the like. In addition, the utility model does not limit the cross section of the channel 220, and the channel 220 with a relatively regular structure such as a circular or square cross section can be generally used.

[0103] In addition, the cross section area of the channel 220 in the embodiment is not too large, and the conductivity of the polarity terminal 21 is not affected; and the cross section area of the channel 220 is not too small, so that the heat exchange area is too small and the heat exchange effect is affected. On the premise of not affecting the conductivity of the polarity terminal 21, the cross section area of the channel 220 is increased as much as possible to increase the heat exchange area and improve the heat exchange effect.

[0104] As shown in Figure 4 and Figure 4 In order to further optimize the heat exchange effect, the embodiment can further be provided with four split rib plates 25 in the channel 220, the four split rib plates 25 are uniformly distributed along the circumference of the channel 220, and each split rib plate 25 extends along the axis of the channel 220. Based on the four split rib plates 25, the contact area between the heat exchange medium and the polarity terminal 21 can be increased, that is, the heat exchange area is increased, and the heat exchange effect can be effectively improved.

[0105] In some other embodiments, according to the size of the channel, the number and arrangement of the split rib plates 25 can be adjusted on the premise of not affecting the flow of the heat exchange medium.

[0106] The embodiment can further be provided with an opening part on the upper cover plate 24, and the opening part is located between the two polarity terminals 21. The opening part can be separated from the upper cover plate 24 of the single battery 20 under the action of an external force or electrolyte, and a through hole penetrating the inner cavity of the shell body is formed on the upper cover plate 24. Based on the through hole, the inner cavity of each single battery 20 is in communication with the gas sharing chamber 5. The opening part adopts an existing structure, and the structure of the opening part 28 on the lower cover plate 27 can be the same or different.

[0107] In combination with Figure 4As can be seen, the top plate 11 of the high-capacity battery housing in this embodiment defines a clearance hole 6 that allows the polarity terminals 21 of each battery cell 20 to extend. In this embodiment, the polarity terminals 21 of the battery cells 20 are poles, which are taller than poles of conventional battery cells 20. The portion of each battery cell 20 polarity terminal 21 provided with a channel 220 extends from the corresponding clearance hole 6, and the area of ​​the housing top plate 11 corresponding to the clearance hole 6 is securely sealed to the outer shell of the battery cell 20.

[0108] Sealing can usually be achieved using the following solutions:

[0109] Option 1: If Figure 3 As shown, the polarity terminals 21 of each single battery 20 extend out of the corresponding avoidance hole 6 , and a sealing connector 15 is added between the avoidance hole 6 and the polarity terminal 21 to achieve fixed sealing between the area of ​​the housing top plate 11 corresponding to the avoidance hole 6 and the housing of the single battery 20 .

[0110] The sealing connector 15 includes a hollow tube; the bottom of the hollow tube is used to seal with the first area of ​​the single cell 20, and the top of the hollow tube is sealed with the second area of ​​the housing top plate 11; wherein the first area is the area around any polarity terminal 21 on the upper cover plate 24 of the single cell 20 of any single cell 20; wherein the area around the polarity terminal 21 is the area around the insulating member on the polarity terminal 21. The second area is the area of ​​the housing top plate 11 corresponding to any avoidance hole 6 on the housing top plate 11. The area of ​​the housing top plate 11 corresponding to the avoidance hole 6 is the area around any avoidance hole 6 on the outer surface of the housing top plate 11; or the area of ​​the housing top plate 11 corresponding to the avoidance hole 6 is the wall of the avoidance hole 6.

[0111] Solution 2: Inject glue into the annular gap between the avoidance hole 6 and the polarity terminal 21 to form a first insulating sealant layer to achieve fixed sealing between the area of ​​the housing top plate 11 corresponding to the avoidance hole 6 and the outer shell of the single battery 20.

[0112] like Figure 3 As shown, in this embodiment, a support member 9 extending along the x-direction is provided between the housing bottom plate 12 and each single cell 20 to form a second channel, which serves as the electrolyte shared chamber 4. A boss extending along the x-direction is provided on the housing top plate 11. A first channel is provided on the boss. This first channel is connected to the inner cavity of the housing 1 and serves as a gas shared chamber 5, communicating with the gas area of ​​the inner cavity of each single cell 20. When gas is generated in the inner cavity of the single cell 20, the inner cavity of the first channel can also serve as a gas storage chamber, alleviating the problem of swelling of the housing 1 caused by gas generation. In other embodiments, the boss structure may not be provided, and each single cell 20 can achieve gas communication through its own through-holes that penetrate its inner cavity to achieve gas balance.

[0113] In some other embodiments, only the electrolyte sharing chamber 4 or the gas sharing chamber 5 can be provided.

[0114] As shown in Figure 10 , the present embodiment utilizes the connecting pipe assembly 3 to connect the passages 220 on the polar terminals 21 of all the monomer batteries 20 in the large-capacity battery, forming a heat exchange passage, and a heat exchange medium is introduced into the heat exchange passage to achieve heat dissipation or heating of the large-capacity battery; when the temperature of the large-capacity battery is higher than a set threshold, the large-capacity battery is cooled by introducing a heat exchange medium with a lower temperature into the heat exchange passage; when the temperature of the large-capacity battery is lower than a set threshold, the large-capacity battery is heated by introducing a heat exchange medium with a higher temperature into the heat exchange passage; by controlling the temperature of the heat exchange medium, the large-capacity battery can always be operated at a normal working temperature.

[0115] As can be seen from Figure 8 , the connecting pipe assembly 3 of the present embodiment includes a first sub-connecting pipe 31 and a plurality of second sub-connecting pipes 32; the two ends of each second sub-connecting pipe 32 are connected to the passages 220 of the polar terminals 21 on the same side of the adjacent monomer battery 20, forming two heat exchange passages at the top of the large-capacity battery, and the first sub-connecting pipe 31 is used to connect the passages 220 of the two polar terminals 21 of the outermost monomer battery 20, that is, to realize the series connection of the two heat exchange passages, forming a U-shaped heat exchange passage at the top of the large-capacity battery, and the two ports of the U-shaped heat exchange passage are used as the liquid inlet and outlet ports for connecting with the outlet and inlet of the heat exchange medium source.

[0116] As shown in Figure 3 , it is a partial cross-sectional view of a large-capacity battery constructed by using the monomer battery shown in Figure 3 . The end face of the second sub-connecting pipe 32 abuts against the end face of the partitioning rib plate 25 located in the passage 220, and the partitioning rib plate 25 not only increases the contact area between the heat exchange medium and the polar terminal 21, but also limits the second sub-connecting pipe 32 in the axial direction (x direction), further improving the stability of the second sub-connecting pipe 32 in the passage 220.

[0117] The free ends of the two polar terminals 21 passages 220 of the other outermost monomer battery 20 (herein, the free end refers to the end of the passage 220 without the port connected to the second sub-connecting pipe 32) can be directly used as the two ports of the U-shaped heat exchange passage (i.e., as the liquid inlet and outlet ports), and are connected with the outlet and inlet of the heat exchange medium source through external pipelines.

[0118] In order to facilitate the connection with the external pipeline, as shown in Figure 10 , the present embodiment can also connect a third sub-connecting pipe 33 to the free end of the polar terminal 21 passage 220 which is used as the liquid inlet and outlet port, and the third sub-connecting pipe 33 is connected with the external pipeline.

[0119] In some other embodiments, the two heat exchange channels can be connected in parallel, that is, the ports on one side of the two heat exchange channels are connected to the outlet of the heat exchange medium source as the liquid inlet, and the ports on the other side of the two heat exchange channels are connected to the inlet of the heat exchange medium source as the liquid outlet.

[0120] It should be noted that:

[0121] 1. Since the polarity terminal 21 directly contacts the heat exchange medium, the ideal heat exchange medium should have good insulation, high specific heat capacity and thermal conductivity, good flame retardant performance, low cost, suitable working temperature, long service life, no corrosion, etc. In the utility model, the heat exchange medium is an insulation heat exchange medium commonly used in the prior art, which can be but is not limited to insulation oil and fluorinated liquid.

[0122] 2. Since the above-mentioned connecting pipe assembly 3 directly contacts the polarity terminal 21, if the polarity terminals 21 of different polarities of the same single battery 20 are electrically connected through the connecting pipe assembly 3, a short circuit will occur, therefore, in the structure shown in the figure (two heat exchange channels are connected in series), the first sub-connecting pipe 31 must be insulated between the two polarity terminals 21 connected thereto. Figure 10

[0123] Generally, the insulation can be achieved in the following ways:

[0124] 2.1. The first sub-connecting pipe 31 is made of insulating material;

[0125] 2.2. The first sub-connecting pipe 31 is made of non-insulating material, and the pipe wall of the first sub-connecting pipe 31 can be insulated, for example, by spraying insulating paint, wrapping insulating film, etc. The inner wall of the channel 220 connected to the first sub-connecting pipe 31 can also be insulated, for example, by spraying insulating paint, etc. An insulating sleeve can also be added between the first sub-connecting pipe 31 and the channel 220. Of course, to be on the safe side, multiple insulation methods can be combined to achieve the insulation between the first sub-connecting pipe 31 and the polarity terminal 21.

[0126] In this embodiment, the first sub-connecting pipe 31 is made of insulating material to achieve the insulation between the first sub-connecting pipe 31 and the polarity terminal 21.

[0127] In addition, since the heat exchange medium flows in the heat exchange channel, the sealing of the entire heat exchange channel is particularly important. In order to ensure the sealing of the heat exchange channel, from the perspective of the utility model, the heat exchange channel is divided into three sub-channels, that is, the first sub-channel 220, the second sub-channel 230 and the third sub-channel 240. Figure 11 It can be seen that, in this embodiment, the first sub-connecting pipe 31, the second sub-connecting pipe 32 and the third sub-connecting pipe 33( Figure 12 ​As a partial sectional view, the first sub-connection pipe 31 and the third sub-connection pipe 33 are not shown to be sealingly connected to the ports of the corresponding channels 220 in an interference fit.

[0128] In other embodiments, a sealing ring can also be added between the two to further improve the sealing performance of the connection part.

[0129] In some other embodiments, threaded sealing connection can also be used to achieve the sealing connection of the first sub-connection pipe 31, the second sub-connection pipe 32 and the third sub-connection pipe 33 to the ports of the corresponding channels 220.

[0130] In the assembly of the present embodiment, the two ends of the second sub-connection pipe 32 are respectively inserted into the two ports of the channels 220 of the adjacent single battery 20 polarity terminal 21. When the second sub-connection pipe 32 uses a pipe segment of hard material, it is required that the channels 220 on the adjacent single battery 20 polarity terminal 21 must be coaxial to achieve effective connection. However, in some cases, due to the existence of processing errors, it is difficult to guarantee the coaxiality of the channels 220 on the adjacent single battery 20 polarity terminal 21, therefore, the non-connection part of the second sub-connection pipe 32 (here, the non-connection part means the part of the second sub-connection pipe 32 that is not connected to the port of the channel 220, which can also be understood as the middle segment of the second sub-connection pipe 32) is preferably flexible, based on the deformation of the second sub-connection pipe 32, to overcome the above-mentioned processing errors, facilitating the sealing connection of the second sub-connection pipe 32 to the ports of the corresponding channels 220.

[0131] Embodiment 2

[0132] The present embodiment is another large-capacity battery, which is different from embodiment 1 in that the present embodiment is based on embodiment 1 and lays an insulating sealing adhesive layer 7 on the top of the large-capacity battery.

[0133] The specific structure is shown in Figure 13 and Figure 14 The insulating sealing adhesive layer 7 covers the top of the large-capacity battery, the main part of the heat exchange channel (which can be understood as including each second sub-connection pipe 32 and each channel 220 on the polarity terminal 21) is located in the insulating sealing adhesive layer, and the liquid inlet end and the liquid outlet end of the heat exchange channel are exposed from the insulating sealing adhesive layer 7, facilitating connection with the heat exchange medium source. At the same time, the insulating sealing adhesive layer 7 also fills the space between the polarity terminal 21 and the sealing connector 15.

[0134] In the present embodiment, the electrical connection part 211 of all the polarity terminals 21 extends out of the insulating sealing adhesive layer 7, so as to be connected with the electrical connector assembly (which is an electrical connector for realizing the parallel connection of each single battery 20 in the large-capacity battery and / or the series connection of adjacent large-capacity batteries).

[0135] Laying the insulating sealing glue layer 7 on the top of the large capacity battery has at least the following advantages:

[0136] I. Further improve the sealing performance of the heat exchange channel;

[0137] Specifically, the insulating sealing glue constituting the insulating sealing glue layer 7 penetrates into the tiny gap between the two ports of the channel 220 and the connecting pipe assembly 3 (including the first, second and third sub connecting pipes), which is the only gap through which the insulating sealing glue cannot enter the inner cavity of the heat exchange channel, and further seals the gap from the radial direction;

[0138] II. Secondary sealing at the position of the escape hole 6;

[0139] Even if there is a tiny gap between the sealing connector 15 and the shell of the single battery 20 and the top plate 11 of the outer shell (which does not allow the insulating sealing glue to pass through), filling the insulating sealing glue into the space between the polarity terminal 21 and the sealing connector 15 can also seal such tiny gaps, further improving the sealing performance at the position of the escape hole 6;

[0140] III. Anti-condensation;

[0141] During long-term use, due to the temperature difference between the inside and outside of the second sub connecting pipe 32, condensation may occur on the surface, which may cause short circuit when the condensation accumulates to a certain amount. By wrapping the second sub connecting pipe 32 with the insulating sealing glue layer 7, the battery short circuit can be prevented when condensation occurs on the surface of the second sub connecting pipe 32 under the protection of the insulating sealing glue layer 7;

[0142] In other embodiments, the electric connection assembly can be connected to the polarity terminal 21, and then the insulating sealing glue layer 7 can be laid on the top of the large capacity battery, that is, the insulating sealing glue layer 7 completely covers the polarity terminal 21 of the single battery 20 and the connection position of the electric connection assembly and the polarity terminal 21. After the outer shell 1 is insulated, only the free end of the electric connection assembly (for realizing the series connection of the large capacity battery) is exposed and charged, and the rest is insulated, so that such a large capacity battery has higher safety performance.

[0143] In order to prevent overflow during the glue injection process, the partial structure of the outer shell 1 is used as a glue blocking plate in this embodiment. The structure of the outer shell 1 will be described in detail below in combination with Figure 13 and Figure 14 .

[0144] As shown in Figure 2 , it is an exploded structure diagram of the outer shell 1 of this embodiment, which is disassembled into an outer cylinder 13 with open ends and an end plate 14 covering the open ends of the outer cylinder 13. The structure of the outer cylinder 13 is as shown in Figure 18As shown, the outer cylinder 13 has open ends at both ends, i.e., the open ends are parallel to the yz plane. In the z-direction, the height of the outer cylinder side panels 131 is higher than that of the outer cylinder top panel 132. The portion of the outer cylinder side panels 131 that is higher than the outer cylinder top panel 132 serves as a rubber baffle. The outer cylinder 13 can be integrally formed using an aluminum extrusion process, which is easy to process and has better sealing performance than a separate structure.

[0145] In addition, in this embodiment, an insulating protective cover 64 can be provided on the top of the large-capacity battery 62 (see Figure 15 and Figure 15 ), in this embodiment, part of the structure of the insulating protective cover 64 is used as a mold for glue injection. After the glue injection is completed, there is no need to demold the mold, and the bonding strength between the insulating protective cover 64 and the top of the large-capacity battery 62 can also be improved. In addition, if the polarity terminals are directly exposed to the external environment, there will be a significant safety hazard during use due to the polarity terminals being charged. Therefore, the provision of the insulating protective cover 64 on the top of the large-capacity battery 62 can also provide insulation protection for the polarity terminals, avoiding the potential safety hazard of the polarity terminals being exposed during the operation of the large-capacity battery 62, and also preventing some foreign matter from the external environment from falling into the polarity terminal position and causing the large-capacity battery 62 to short-circuit, thereby improving the safety of the large-capacity battery 62.

[0146] Example 3

[0147] This embodiment is an energy storage device, comprising a temperature control system 2 and at least one battery cluster. The battery cluster comprises at least one battery pack 61, and each battery pack 61 comprises at least one large-capacity battery 62 of the above embodiment.

[0148] The structure of temperature control system 2 is as follows Figure 15 As shown, it includes a heat transfer unit 22 and a heat treatment unit 23; the heat transfer unit 22 is used to realize the transmission of heat transfer medium between the heat exchange channel in each large-capacity battery 62 and the heat treatment unit 23 ( Figure 16 The heat treatment unit 23 is used to heat or cool the heat transfer medium in the heat transport unit 22.

[0149] The heat transfer unit 22 of this embodiment includes a liquid supply pipeline assembly 233, a liquid outlet pipeline assembly 234, a liquid inlet pipeline assembly 231 and a liquid return pipeline assembly 232; the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 mainly realize the transportation of heat transfer medium between the heat treatment unit 23 and each battery cluster, and the liquid inlet pipeline assembly 231 and the liquid return pipeline assembly 232 realize the transportation of heat transfer medium within each battery cluster. Figure 15In the figure, only three sets of liquid inlet pipeline assemblies 231 and liquid return pipeline assemblies 232 are shown schematically, and only the pipelines corresponding to one battery pack 61 in the battery cluster are shown schematically in each set of liquid inlet pipeline assemblies 231 and liquid return pipeline assemblies 232.

[0150] In operation, the liquid supply pipeline assembly 233 delivers the heat transfer medium in the heat treatment unit 23 to each battery cluster, and the liquid outlet pipeline assembly 234 collects the heat transfer medium after heat exchange in each battery cluster to the heat treatment unit 23. In each battery cluster, the liquid inlet pipeline assembly 231 distributes the heat transfer medium in the liquid supply pipeline assembly 233 to each large-capacity battery 62 in the battery pack 61, and the liquid return pipeline assembly 232 collects the heat transfer medium after heat exchange in the multiple large-capacity batteries 62 to the liquid outlet pipeline assembly 234. The heat transfer medium forms a circulation loop through the liquid supply pipeline assembly 233, the liquid outlet pipeline assembly 234, the liquid inlet pipeline assembly 231, the liquid return pipeline assembly 232, and the heat treatment unit 23, and controls the temperature of the large-capacity batteries 62 in each battery cluster.

[0151] The pipeline arrangement of the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 is described in detail below.

[0152] If the number of battery clusters in the energy storage device is one, the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 are both single pipelines. The two ends of the liquid supply pipeline assembly 233 are connected to the liquid inlet pipeline assembly 231 and the heat treatment unit 23, respectively, and the two ends of the liquid outlet pipeline assembly 234 are connected to the liquid return pipeline assembly 232 and the heat treatment unit 23, respectively, to realize the delivery of the heat transfer medium.

[0153] If the number of battery clusters in the energy storage device is N, where N is greater than 1, and the N battery clusters are arranged in a matrix, the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 are both combinations of multiple pipelines, and the pipeline arrangement is adjusted according to the arrangement of the battery clusters. The specific arrangement is as follows:

[0154] First, the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 each include N liquid supply pipelines and N liquid outlet pipelines. The N liquid supply pipelines are connected one-to-one to the liquid inlet pipeline assemblies 231 in the N battery clusters, and the other ends are all connected to the heat treatment unit 23. The N liquid outlet pipelines are connected one-to-one to the liquid return pipeline assemblies 232 in the N battery clusters, and the other ends are all connected to the heat treatment unit 23. That is, each battery cluster is connected to the heat treatment unit 23 using independent pipelines. This kind of pipeline arrangement requires more pipelines for installation and manufacturing, and the heat treatment unit 23 also needs to be provided with N liquid inlet ports 2411 and N liquid outlet ports 2412, making the structure of the heat treatment unit 23 more complex.

[0155] Second, as shown in FIG. 4, the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 each include N liquid supply pipelines and N liquid outlet pipelines. The N liquid supply pipelines are connected one-to-one to the liquid inlet pipeline assemblies 231 in the N battery clusters, and the other ends are all connected to the heat treatment unit 23. The N liquid outlet pipelines are connected one-to-one to the liquid return pipeline assemblies 232 in the N battery clusters, and the other ends are all connected to the heat treatment unit 23. That is, each battery cluster is connected to the heat treatment unit 23 using independent pipelines. This kind of pipeline arrangement requires more pipelines for installation and manufacturing, and the heat treatment unit 23 also needs to be provided with N liquid inlet ports 2411 and N liquid outlet ports 2412, making the structure of the heat treatment unit 23 more complex. Figure 17As shown, the liquid supply pipeline assembly 233 includes a first shunt pipe 2331, a second shunt pipe 2332, and a third shunt pipe 2333; the inlet of the first shunt pipe 2331 is used to be connected with the heat treatment unit 23; the second shunt pipe 2332 is used to shunt the heat transfer medium in the first shunt pipe 2331 to different column or different row battery clusters; and the third shunt pipe 2333 is used to shunt the heat transfer medium in the second shunt pipe 2332 to the same column or the same row battery cluster.

[0156] The liquid outlet pipeline assembly 234 includes a first confluence pipe 2341, a second confluence pipe 2342, and a third confluence pipe 2343; the third confluence pipe 2343 is used to converge the heat transfer medium in the same column or the same row battery cluster to the second confluence pipe 2342; the second shunt pipe 2332 is used to converge the heat transfer medium in different column or different row battery clusters to the first confluence pipe 2341; and the outlet of the first confluence pipe 2341 is used to be connected with the heat treatment unit 23.

[0157] The liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 are made by multiple levels of pipelines, so that the heat transfer medium flowing out of the heat treatment unit 23 is shunted and evenly distributed to each battery cluster in stages, and the flow of the heat transfer medium distributed to each battery cluster is balanced, so that each battery cluster and each large-capacity battery 62 in the battery cluster has a good and balanced heat dissipation effect, thereby improving the working stability and service life of the energy storage equipment. At the same time, the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 are made by multiple levels of pipelines, so that the heat treatment unit 23 only needs to be provided with one liquid inlet 2411 and one liquid outlet 2412, and the structure of the heat treatment unit 23 is relatively simple. In addition, the entire pipeline is relatively convenient to manufacture and install.

[0158] The embodiment can also be provided with a water supplement joint on the first shunt pipe 2331 for supplementing the heat transfer medium for the temperature control system 2, and an exhaust valve on the first confluence pipe 2341 for exhausting air in the temperature control system 2, so that the temperature control system 2 can efficiently control the temperature of each large-capacity battery 62 and improve the temperature control effect of the temperature control system 2.

[0159] After the heat transfer medium treated by the heat treatment unit 23 is shunted to the plurality of battery clusters by the liquid supply pipeline assembly 233, each battery cluster realizes the delivery of the heat transfer medium of each large-capacity battery 62 in the battery cluster by the liquid inlet pipeline assembly 231 and the liquid return pipeline assembly 232, respectively. The pipeline arrangement of the liquid inlet pipeline assembly 231 and the liquid return pipeline assembly 232 is described in detail below.

[0160] The inlet and return lines 231 and 232 are installed and manufactured based on the number of battery packs 61 and the number and arrangement of the high-capacity batteries 62 in the battery cluster. In this embodiment, multiple high-capacity batteries 62 are arranged horizontally (in the xy plane, along the y direction) to form a battery pack 61. Subsequently, multiple battery packs 61 are arranged vertically (in the z direction) to form a battery cluster. In this case, the inlet and return lines 231 and 232 can be manufactured in the following manner:

[0161] First, the liquid inlet and return line assemblies 231 and 232 are manufactured as a single piece. This means the entire temperature control system consists of a single heat transfer medium pipe, which undergoes multiple bends, both vertically and horizontally. This installation method requires numerous bends, places high demands on pipe quality, and results in relatively poor installation reliability and convenience. Furthermore, it is prone to installation errors.

[0162] Second, if Figure 18 、 Figure 17 and Figure 19 As shown, the liquid inlet pipeline assembly 231 and the liquid return pipeline assembly 232 are manufactured and installed separately, and the liquid inlet pipeline assembly 231 and the liquid return pipeline assembly 232 are manufactured through multi-stage pipelines.

[0163] The liquid inlet pipe assembly 231 specifically includes a primary liquid inlet pipe 2311, multiple secondary liquid inlet pipes 2312 and multiple tertiary liquid inlet pipes 2313; the liquid inlet port 2411 of the primary liquid inlet pipe 2311 is connected to the liquid supply pipe assembly 233; the multiple secondary liquid inlet pipes 2312 correspond one to one with the battery packs 61 in the battery cluster; the multiple secondary liquid inlet pipes 2312 are all connected to the primary liquid inlet pipe 2311, and each secondary liquid inlet pipe 2312 provides heat transfer medium to the corresponding battery pack 61, that is, the multiple secondary liquid inlet pipes 2312 divert the heat transfer medium in the primary liquid inlet pipe 2311 to the corresponding battery packs one by one. 61; multiple three-stage liquid inlet pipes 2313 correspond one-to-one to the large-capacity batteries 62 in the battery cluster; for each battery pack 61, multiple three-stage liquid inlet pipes 2313 are connected to the secondary liquid inlet pipe 2312 corresponding to the battery pack 61, and at the same time, each three-stage liquid inlet pipe 2313 is respectively connected to the liquid inlet end of the heat exchange channel of the large-capacity batteries 62 in the battery pack 61, and each three-stage liquid inlet pipe 2313 provides heat transfer medium to the heat exchange channel of the large-capacity batteries 62 respectively. That is to say, multiple three-stage liquid inlet pipes 2313 divert the heat transfer medium in the secondary liquid inlet pipe 2312 to multiple large-capacity batteries 62.

[0164] The return liquid pipeline assembly 232 specifically comprises a first-stage liquid outlet pipe 2321, a plurality of second-stage liquid outlet pipes 2322, and a plurality of third-stage liquid outlet pipes 2323; the plurality of second-stage liquid outlet pipes 2322 correspond to the battery packs 61 in the battery cluster one by one; the plurality of third-stage liquid outlet pipes 2323 correspond to the large-capacity batteries 62 in the battery cluster one by one; for each battery pack 61, one end of each third-stage liquid outlet pipe 2323 is connected to the liquid outlet port of the heat exchange channel of each large-capacity battery 62 in the battery pack 61, and the other end of each third-stage liquid outlet pipe 2323 is connected to the corresponding second-stage liquid outlet pipe 2322 of the battery pack 61, so as to converge the heat transfer medium after heat exchange of the plurality of large-capacity batteries 62 into the second-stage liquid outlet pipe 2322; each second-stage liquid outlet pipe 2322 is connected to the first-stage liquid outlet pipe 2321, so as to converge the heat transfer medium after heat exchange of the plurality of battery packs 61 into the first-stage liquid outlet pipe 2321; and the first-stage liquid outlet pipe 2321 is connected to the return liquid pipeline assembly 234.

[0165] The third-stage liquid inlet pipe 2313 and the third-stage liquid outlet pipe 2323 can be made of flexible pipes, specifically metal bellows, which can reduce the installation error with the large-capacity batteries 62, reduce the installation requirements on site, and further increase the installation convenience of the temperature control pipeline assembly.

[0166] The liquid inlet pipeline assembly 231 and the return liquid pipeline assembly 232 are made of multi-stage pipes, so that the heat transfer medium flowing out of the liquid supply pipeline assembly 233 is distributed step by step and evenly to each large-capacity battery 62, and the heat transfer medium flow distributed to each large-capacity battery 62 is balanced, so that each large-capacity battery 62 in the battery cluster has a good and balanced heat dissipation effect, thereby improving the working stability and service life of the energy storage equipment.

[0167] The second-stage liquid inlet pipe 2312 and the second-stage liquid outlet pipe 2322 can be formed by splicing multiple sections of pipes, i.e., the second-stage liquid inlet pipe 2312 and the second-stage liquid outlet pipe 2322 can be formed by splicing multiple sections of pipes and three-way joints. This kind of splicing connection reduces the error and assembly difficulty when connecting the pipes, and is very convenient to install and disassemble. At the same time, when subsequent maintenance is needed, only the pipe connection head of the relevant large-capacity battery 62 needs to be disassembled for maintenance, without the need to disassemble the entire temperature control pipeline assembly, thereby facilitating installation and maintenance.

[0168] As shown in FIG. 6, the liquid supply pipeline assembly 233 comprises a plurality of first-stage liquid inlet pipes 2311, a plurality of second-stage liquid inlet pipes 2312, and a plurality of third-stage liquid inlet pipes 2313; the plurality of second-stage liquid inlet pipes 2312 correspond to the battery packs 61 in the battery cluster one by one; the plurality of third-stage liquid inlet pipes 2313 correspond to the large-capacity batteries 62 in the battery cluster one by one; for each battery pack 61, one end of each third-stage liquid inlet pipe 2313 is connected to the liquid inlet port of the heat exchange channel of each large-capacity battery 62 in the battery pack 61, and the other end of each third-stage liquid inlet pipe 2313 is connected to the corresponding second-stage liquid inlet pipe 2312 of the battery pack 61, so as to converge the heat transfer medium into the second-stage liquid inlet pipe 2312; each second-stage liquid inlet pipe 2312 is connected to the first-stage liquid inlet pipe 2311, so as to converge the heat transfer medium into the first-stage liquid inlet pipe 2311; and the first-stage liquid inlet pipe 2311 is connected to the liquid supply pipeline assembly 233. Figure 21As shown, in order to further facilitate connection, the secondary liquid outlet pipe 2322 is connected with the primary liquid outlet pipe 2321 by using a quick connector 236 and a hose 235. The hose 235 reduces the installation error when the secondary liquid outlet pipe 2322 is connected with the primary liquid outlet pipe 2321, reduces the installation requirement on site, and further increases the installation convenience of the temperature control pipeline assembly. The quick connector 236 can realize quick installation of the secondary liquid outlet pipe 2322 and the primary liquid outlet pipe 2321, and can be directly plugged and unplugged without tools, thereby improving the convenience of installation or disassembly. In addition, the quick connector 236 also has a bidirectional self-sealing function. During plugging and unplugging of the quick connector 236, the flow of liquid can be automatically cut off, so that when the large-capacity battery 62 and the pipeline assembly are maintained, the heat transfer medium in each pipeline does not need to be emptied, the convenience of maintenance is improved, the dismountability of the pipeline is improved, and the subsequent maintenance and replacement of the main pipeline are facilitated.

[0169] In addition, all or part of the pipelines of the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234, the liquid inlet pipeline assembly 231, and the liquid return pipeline assembly 232 are provided with a heat preservation layer. The heat preservation layer can effectively prevent the loss of cold or heat of the heat transfer medium, reduce energy consumption, and avoid condensation on the walls of the pipelines. At the same time, the diameters of the pipelines gradually decrease from the heat treatment unit 23 to the large-capacity battery 62, that is, the diameter of the primary shunt pipe 2331 > the diameter of the secondary shunt pipe 2332 > the diameter of the tertiary shunt pipe 2333 > the diameter of the primary liquid inlet pipe 2311 > the diameter of the secondary liquid inlet pipe 2312 > the diameter of the tertiary liquid inlet pipe 2313 > the diameter of the primary liquid outlet pipe 2321 > the diameter of the secondary liquid outlet pipe 2322 > the diameter of the tertiary liquid outlet pipe 2323. This arrangement makes the flow deviation of the heat transfer medium for heat exchange with each large-capacity battery 62 smaller, reduces the temperature difference of the large-capacity battery 62, and improves the service life of the large-capacity battery 62.

[0170] As shown in FIGS. 1 and 2, Figure 20 and Figure 21 As shown, the heat treatment unit 23 in the embodiment includes a temperature control machine 241. The temperature control machine 241 is used for heating or cooling the heat transfer medium delivered by the heat delivery unit 22. The temperature control machine 241 is a device with heating and / or cooling functions, such as a cooling and heating machine or a water chiller.

[0171] The temperature control machine 241 is generally provided with a liquid inlet 2411 and a liquid outlet 2412, and the temperature control machine 241 is connected with the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 through the liquid inlet 2411 and the liquid outlet 2412. At this time, in order to facilitate maintenance, the liquid inlet 2411 and the liquid outlet 2412 of the temperature control machine 241 are provided with a blocking joint 44, which can block the heat transfer medium in the temperature control machine 241 when the temperature control machine 241 is installed and removed.

[0172] As shown in Figure 22 The blocking joint 44 includes a joint end pipe 441, an adjusting valve 442 and two welding chucks 443. One end of the adjusting valve 442 is connected with the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 through the welding chuck 443, and the other end is connected with the joint end pipe 441 through the welding chuck 443. The joint end pipe 441 is used to connect with the liquid inlet 2411 and the liquid outlet 2412 of the temperature control machine 241. The adjusting valve 442 can be a butterfly valve. When the temperature control machine 241 is working normally, the adjusting valve 442 is in a normally open state, and the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 are in a normal flow state with the heat transfer medium in the temperature control machine 241. When the temperature control machine 241 needs to be removed and maintained, the adjusting valve 442 is closed, and the blocking joint 44 blocks the inflow and outflow of the heat transfer medium in the temperature control machine 241. At this time, the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 are in a disconnected state with the heat transfer medium in the temperature control machine 241, and then the temperature control machine 241 can be directly removed from the liquid supply pipeline assembly 233 and the liquid outlet pipeline assembly 234 without the need for corresponding liquid discharge operation, thereby improving the convenience and reliability during maintenance.

[0173] As shown in Figure 20 The heat treatment unit 23 of the embodiment can further include a heat sink 242 and a control valve 243. The liquid inlet 2411 of the temperature control machine 241 is connected with the liquid outlet pipeline assembly 234, and the liquid outlet 2412 of the temperature control machine 241 is connected with the liquid supply pipeline assembly 233, which is used to heat or cool the heat transfer medium. The control valve 243 is used to control whether the heat transfer medium enters the heat sink 242. The liquid inlet and the liquid outlet of the heat sink 242 are connected with the liquid outlet pipeline assembly 234, which is used to dissipate heat of the heat transfer medium.

[0174] The heat sink 242 can dissipate heat of the heat transfer medium, which can be a heat dissipation coil pipe and the like, and can exchange heat with the external environment to reduce the temperature of the heat transfer medium.

[0175] The control valve 243 can be a valve with different control modes or structures, as long as it can control the on-off of the heat transfer medium. For example, it can be a pneumatic valve, an electric valve, a hydraulic valve, etc. For convenient control, an electric valve is preferred. The electric valve is convenient to control, easy to operate, and easy to install on site. The control valve 243 in the embodiment includes a three-way electric valve. The first port of the three-way electric valve is in communication with the liquid inlet 2411 of the temperature control machine 241, the second port is in communication with the liquid outlet pipeline assembly 234, and the third port is in communication with the liquid outlet of the radiator 242. When the three-way electric valve is used for control, only a single device is needed to achieve control, and the structure is simple and easy to install.

[0176] In the embodiment, a fan is further arranged on the outside of the radiator 242 to further dissipate heat from the heat transfer medium in the radiator 242. A large-capacity battery 62 can generate a large amount of heat during charging and discharging. In order to dissipate the heat and utilize the ambient temperature as much as possible, the fan is arranged. In this way, even in a high-temperature condition of 40℃, the temperature of the large-capacity battery 62 can be ensured to be below 50℃. The control of the temperature of the large-capacity battery 62 is mainly an energy consumption problem. The use of air conditioning and other refrigeration equipment has high energy consumption. Therefore, the ambient temperature is used as much as possible to control the temperature of the large-capacity battery 62.

[0177] The working modes of the temperature control system 2 include the following three modes:

[0178] The first mode is the radiator 242 alone cooling mode.

[0179] As shown in Figure 22 When the temperature of the large-capacity battery 62 reaches the first high-temperature threshold, the first port and the third port of the three-way electric valve are in communication, and the second port is closed. The heat transfer medium in the heat exchange channel exchanges heat with the large-capacity battery 62. Then, the heat transfer medium in the heat exchange channel enters the radiator 242 through the liquid outlet pipeline assembly 234. The radiator 242 processes the heat in the heat transfer medium. Then, the heat transfer medium with reduced temperature enters the temperature control machine 241. At this time, the temperature control machine 241 does not work, only to ensure the passage of the heat transfer medium. Then, the heat transfer medium returns to the heat exchange channel through the liquid supply pipeline assembly 233, and exchanges heat with the large-capacity battery 62 again, so as to realize passive cooling through the radiator 242.

[0180] The second mode is the temperature control machine 241 alone cooling and heating mode.

[0181] As shown in ​As shown, when the temperature of the large-capacity battery 62 reaches the second high temperature threshold, the first port and the second port of the three-way electric valve are connected, and the third port is closed, and the heat exchange channel exchanges heat with the large-capacity battery 62. Subsequently, the heat transfer medium in the heat exchange channel enters the temperature controller 241 through the liquid outlet pipeline assembly 234. At this time, the temperature controller 241 works to actively cool the heat transfer medium. Subsequently, the cooled heat transfer medium returns to the heat exchange channel through the liquid supply pipeline assembly 233 to exchange heat with the large-capacity battery 62, thereby achieving active cooling through the temperature controller 241.

[0182] When the temperature of the large-capacity battery 62 reaches the low-temperature threshold, the first port and the second port of the three-way electric valve are connected, and the third port is closed. The temperature controller 241 works to heat up the heat transfer medium in the temperature control tube. The heated heat transfer medium returns to the heat exchange channel through the liquid supply pipeline assembly 233 to exchange heat with the large-capacity battery 62, thereby achieving active heating through the temperature controller 241.

[0183] The third type is a cooling mode in which the radiator 242 and the temperature controller 241 cool down together:

[0184] like ​ As shown, when the temperature of the large-capacity battery 62 reaches the third high temperature threshold, the first port and the third port of the three-way electric valve are connected, and the second port is closed. The heat transfer medium in the heat exchange channel exchanges heat with the large-capacity battery 62. Subsequently, the heat transfer medium in the heat exchange channel enters the radiator 242 through the liquid outlet pipeline assembly 234. The radiator 242 processes the heat in the heat transfer medium. Subsequently, the heat transfer medium with reduced temperature enters the temperature controller 241. At this time, the temperature controller 241 is turned on to cool the heat transfer medium. Subsequently, the heat transfer medium returns to the heat exchange channel through the liquid supply pipeline assembly 233 and exchanges heat with the large-capacity battery 62 again, thereby achieving passive cooling and active cooling through the radiator 242 and the temperature controller 241.

[0185] It should be noted that: the third high temperature threshold>the second high temperature threshold>the first high temperature threshold.

[0186] The heat treatment unit 23 utilizes the radiator 242 and temperature controller 241 to perform a combined active heat dissipation, active heating, and passive heat dissipation on the large-capacity battery 62. This approach not only ensures that the heat of the large-capacity battery 62 is effectively treated, but also minimizes the cost of temperature control, effectively conserving energy. This avoids the energy waste associated with active temperature control alone, and also avoids the drawback of inability to timely control the temperature of the large-capacity battery 62 associated with passive temperature control alone. This configuration allows the heat treatment unit 23 to fully exchange heat with the external environment, fully utilizing the external environment's temperature, thereby reducing the time required for active cooling and conserving energy.

Claims

1. An energy storage device, characterized by: The temperature control system comprises a heat delivery unit and a heat treatment unit. The heat delivery unit is used to deliver the heat transfer medium between the heat exchange channels and the heat treatment unit. The heat treatment unit is used to heat or cool the heat transfer medium delivered by the heat delivery unit. The inner wall of the channel is provided with a partition rib plate for increasing the heat exchange area. The partition rib plate is a plurality of partition rib plates, which are evenly distributed along the circumference of the channel.

2. The energy storage device of claim 1, wherein: The large-capacity battery further comprises a connecting pipe assembly.

3. The energy storage device of claim 2, wherein: Each end of each second sub-connecting pipe is sealingly connected to the channel on the same side of the adjacent monomer battery.

4. The energy storage device of claim 1, wherein: The connecting pipe assembly further comprises a first sub-connecting pipe. The two ends of the first sub-connecting pipe are insulatingly and sealingly connected to the channels on the two polarity terminals of the outermost monomer battery in the large-capacity battery.

5. The energy storage device of claim 4, wherein: An insulating sealing adhesive layer is provided on the top plate of the shell.

6. The energy storage device of claim 1, wherein: The main part of the heat exchange channel is located in the insulating sealing adhesive layer.

7. The energy storage device of claim 6, wherein: The liquid inlet end and the liquid outlet end of the heat exchange channel extend out of the insulating sealing adhesive layer.

8. The energy storage device of any one of claims 1-7, wherein: The electric connecting member assembly is connected to the electric connection part of each polarity terminal. The electric connecting member assembly is connected to the electric connection part of each polarity terminal. The heat delivery unit comprises a liquid supply pipe assembly, a liquid outlet pipe assembly, a liquid inlet pipe assembly, and a liquid return pipe assembly. The liquid supply pipe assembly is used to deliver the heat transfer medium in the heat treatment unit to each battery cluster.

9. The energy storage device of claim 8, wherein: The liquid outlet pipe assembly is used to collect the heat transfer medium after heat exchange with each battery cluster to the heat treatment unit. The liquid inlet pipe assembly and the liquid outlet pipe assembly correspond to the battery cluster one by one. In each battery cluster, the liquid inlet pipe assembly is used to distribute the heat transfer medium in the liquid supply pipe assembly to the heat exchange channels of the large-capacity batteries. The liquid return pipe assembly is used to collect the heat transfer medium after heat exchange in the heat exchange channels of the large-capacity batteries to the liquid outlet pipe assembly. Each liquid inlet pipe assembly comprises a primary liquid inlet pipe, a plurality of secondary liquid inlet pipes, and a plurality of tertiary liquid inlet pipes. The liquid inlet of the primary liquid inlet pipe is used to connect with the liquid supply pipe assembly. The secondary liquid inlet pipe corresponds to the battery pack in the battery cluster corresponding to the liquid inlet pipe assembly one by one. Each secondary liquid inlet pipe is connected to the primary liquid inlet pipe to distribute the heat transfer medium in the primary liquid inlet pipe to the corresponding battery pack. The tertiary liquid inlet pipe corresponds to one large-capacity battery in the battery cluster corresponding to the liquid inlet pipe assembly; for each battery pack, two ends of each tertiary liquid inlet pipe are connected with the secondary liquid inlet pipe and the heat exchange channel of the corresponding large-capacity battery, respectively, and each tertiary liquid inlet pipe divides the heat transfer medium in the secondary liquid inlet pipe into the heat exchange channel of the corresponding large-capacity battery in the battery pack; The liquid outlet pipe assembly includes a primary liquid outlet pipe, a plurality of secondary liquid outlet pipes, and a plurality of tertiary liquid outlet pipes; The liquid outlet of the primary liquid outlet pipe is used to be connected with the liquid outlet pipe assembly; The secondary liquid outlet pipe corresponds to one battery pack in the battery cluster; each secondary liquid outlet pipe is connected with the primary liquid outlet pipe, and the heat transfer medium after heat exchange of the battery pack is gathered into the primary liquid outlet pipe; The tertiary liquid outlet pipe corresponds to one large-capacity battery in the battery cluster; for each battery pack, two ends of each tertiary liquid outlet pipe are connected with the secondary liquid outlet pipe corresponding to the battery pack and the heat exchange channel of the corresponding large-capacity battery, respectively, and are used to gather the heat transfer medium after heat exchange with the large-capacity battery into the secondary liquid outlet pipe.

10. The energy storage device of claim 9, wherein: The battery clusters are multiple and arranged in a matrix form; The liquid supply pipe assembly includes a primary shunt pipe, a secondary shunt pipe, and a tertiary shunt pipe; the inlet of the primary shunt pipe is used to be connected with the heat treatment unit; the secondary shunt pipe is used to divide the heat transfer medium in the primary shunt pipe into different columns or different rows of battery clusters, and the tertiary shunt pipe is used to divide the heat transfer medium in the secondary shunt pipe into multiple battery clusters in the same column or the same row; The liquid outlet pipe assembly includes a primary confluence pipe, a secondary confluence pipe, and a tertiary confluence pipe; the tertiary confluence pipe is used to gather the heat transfer medium of multiple battery clusters in the same column or the same row into the secondary confluence pipe; the secondary confluence pipe is used to gather the heat transfer medium of different columns or different rows of battery clusters into the primary confluence pipe; and the outlet of the primary confluence pipe is used to be connected with the heat treatment unit.

11. The energy storage device of claim 10, wherein: At least part of the pipes of the liquid supply pipe assembly, the liquid outlet pipe assembly, the liquid inlet pipe assembly, and the liquid return pipe assembly is provided with a heat preservation layer; the secondary liquid inlet pipe and the secondary liquid outlet pipe are formed by splicing multiple sections of pipes; the liquid supply pipe assembly is provided with a water supplement joint, and the liquid outlet pipe assembly is provided with an exhaust valve.

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