Battery boxes, battery packs, and energy storage containers

Abstract

The present invention provides a battery box, a battery pack, and an energy storage container. The battery box comprises a bottom plate having several cooling channels provided inside for circulating a cooling medium, a housing commonly surrounding the bottom plate to form a mounting cavity, and a busbar installed at at least one end of the bottom plate, located inside or outside the mounting cavity, connected to the bottom plate, and communicating with the cooling channels. The battery box, battery pack, and energy storage container of the present invention can achieve uniform heat dissipation to the battery module, facilitate thermal management inside the battery pack, and enhance battery safety.

Description

Technical Field

[0001] This application mainly relates to the field of battery technology, and particularly relates to battery boxes, battery packs and energy storage containers.

Background Art

[0002] In the charging and discharging process of an energy storage battery box, in order to solve the occurrence of the thermal runaway phenomenon of battery cells, the battery system needs to have a specific cooling function. The integrated liquid cooling of the box body at the bottom of the battery has become the mainstream in the market. It can not only meet the cooling of the battery system, but also play the role of loading battery modules.

[0003] In order to increase the energy density of a battery pack, in some conventional battery packs, a technology of integrating a liquid cooling channel into the box body has been proposed. Generally, the bottom plate of the battery pack is made using a standard profile, and the cavity inside the profile is used as a channel for the coolant to flow through. In order to further reduce the flow resistance of the coolant in the channel, usually, a cooling channel structure design scheme with a plurality of parallel channels is adopted. However, due to the high flow rate of the coolant, there is a problem of uneven flow distribution in the coolant in the plurality of parallel channels, and the cooling effect of the liquid cooling channel on the battery modules in the battery pack becomes uneven. Finally, the temperature difference during the charging and discharging process between the battery modules in the battery pack becomes large, the life consistency of the battery modules becomes poor, and furthermore, the overall life of the battery pack decreases.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In related technologies, employees install fire-resistant partitions between multiple battery packs to prevent the spread of fire. However, if thermal runaway ignition occurs in multiple battery packs or battery clusters, the large amount of gas generated usually leads to more serious consequences if the pressure is not released in a timely manner. To address this problem, some employees install exhaust passages inside the battery compartment, but since the battery packs are isolated by fire-resistant partitions, the exhaust efficiency is affected by the partitions. If multiple batteries explode and burn, it can cause deformation or rupture of the cabinet, posing a significant safety risk. Furthermore, conventional battery compartments have a large number of battery packs and a complex layout, so conventional technologies always suffer from the problem of uneven coolant transport and inefficient cooling for battery pack thermal management in battery clusters.

[0005] Therefore, a battery box, battery pack, and energy storage container are needed to solve the aforementioned problems. [Means for solving the problem]

[0006] The technical problem that this invention aims to solve is to provide a battery box, a battery pack, and an energy storage container that can achieve uniform heat dissipation to the battery module, facilitate thermal management inside the battery pack, and enhance the safety of the battery.

[0007] To solve the above technical problems, the present invention provides a battery box comprising: a bottom plate having several cooling channels provided inside for circulating a cooling medium; a housing commonly surrounding the bottom plate to form a mounting cavity; and a busbar installed at at least one end of the bottom plate, located inside or outside the mounting cavity, connected to the bottom plate, and communicating with the cooling channels.

[0008] Optionally, when the busbar is located outside the mounting cavity, the housing comprises a plurality of side plates and at least one mounting plate having a mounting slot formed between it and the bottom plate, with at least a portion of the busbar housed inside the mounting slot.

[0009] Optionally, the mounting plate comprises a sequentially connected flat plate segment and a bent plate segment, one end of the bent plate segment being connected to the flat plate segment, the other end of the bent plate segment extending toward the mounting cavity and being connected to the bottom plate, and the mounting slot being formed between the bent plate segment and the bottom plate.

[0010] Optionally, the multiple side plates include first side plates connected to both ends of the mounting plate, and the busbar extends along a second direction such that its projection on the first side plate along the second direction does not exceed the first side plate.

[0011] Optionally, the busbar is housed inside the mounting slot, or a portion of the busbar is housed inside the mounting slot along the first direction, and the other portion of the busbar is exposed outside the mounting slot, and a redundant portion is formed in the portion of the first side plate that extends outside the mounting plate along the first direction, and the projected region of the busbar along the second direction is located within the redundant portion.

[0012] Optionally, when the busbar is located outside the mounting cavity, one end of the housing away from the bottom plate has a flange extending outward from the mounting cavity, and the projection area of ​​the flange on the bottom plate in a direction perpendicular to the bottom plate includes the projection area of ​​the busbar on the bottom plate.

[0013] Optionally, the side plate comprises first side plates connected to both ends of the mounting plate, with a reinforcing plate installed at one end of the first side plate closest to the bottom plate, the reinforcing plate installed on the side of the first side plate away from the mounting cavity, the reinforcing plate protruding toward the side away from the mounting cavity, and a sandwich cavity formed between the reinforcing plate and the first side plate.

[0014] Optionally, the side plate comprises first side plates connected to both ends of the mounting plate, and a reinforcing beam extending in the first direction is installed on the side of the first side plate away from the mounting cavity.

[0015] Optionally, when the busbar is located outside the mounting cavity, the busbar is installed at one end of the bottom plate, the bottom plate further having an inlet and an outlet communicating with the cooling channel, and the busbar has an inlet communicating with the inlet and an outlet communicating with the outlet; or the busbar is installed at both ends of the bottom plate, the busbar located at one end of the bottom plate having an inlet and communicating with the inlet of the cooling channel, and the busbar located at the other end of the bottom plate having an outlet and communicating with the outlet of the cooling channel.

[0016] As an option, the battery box comprises a box body comprising: a bottom plate having several parallel cooling channels provided inside for circulating a cooling medium; a housing having a fluid inlet structure and a fluid outlet structure that are commonly surrounded to form the mounting cavity with the bottom plate; a busbar attached to the bottom plate, having a busbar cavity formed inside which a fluid inlet passage is divided into a fluid inlet passage having one end communicating with the fluid inlet structure and the other end communicating with the fluid inlet of several parallel cooling channels, and a fluid outlet passage having one end communicating with the fluid outlet of several parallel cooling channels and the other end communicating with the fluid outlet structure; and a flow guide structure including a male end installed on the busbar and a female end installed on the bottom plate, the male end and the female end being mated together to allow the cooling medium to flow uniformly into several parallel cooling channels.

[0017] Optionally, the busbar is located inside the mounting cavity, the fluid inlet structure comprises a water inlet nozzle drilled in the housing and a first flow collector block communicating with the water inlet nozzle and the fluid inlet passage, the fluid outlet structure comprises a water outlet nozzle drilled in the housing and a second flow collector block communicating with the water outlet nozzle and the fluid outlet passage, the bottom wall of the busbar is provided with several fluid inlet ports, each communicating with the fluid inlet passage and several fluid outlet ports, each communicating with the fluid outlet passage, the fluid inlet ports and fluid outlet ports correspond one-to-one with the cooling passage, each fluid inlet port communicates with a fluid inlet of one of the cooling passages, and each fluid outlet port communicates with a corresponding fluid outlet of the cooling passage.

[0018] Optionally, upper limit steps constituting the male end of the flow guide structure are provided in the circumferential direction of the liquid inlet and / or liquid outlet, and lower limit steps constituting the female end of the flow guide structure are recessed at positions on the bottom plate corresponding to the upper limit steps, the upper limit steps and the lower limit steps are inserted through each other to form a fitting connection surface, and the upper limit steps introduce the cooling medium into the cooling channel.

[0019] As an option, partition ribs are provided within the bottom plate to divide the cooling channel into several sub-channels.

[0020] In another embodiment of the present invention, a battery bag is provided comprising a plurality of batteries and a battery box, wherein the battery box is adapted to house the plurality of batteries.

[0021] Optionally, the battery pack further comprises an aerosol fire suppression device and a battery management system, wherein the aerosol fire suppression device is located above or to one side of the plurality of batteries, and the aerosol fire suppression device further comprises a state feedback device and is arranged to be connected to the battery management system via the state feedback device, and the state feedback device is applied to provide the battery management system with a state quantity indicating whether or not the aerosol fire suppression device has been activated.

[0022] Another embodiment of the present invention further provides an energy storage container comprising a battery rack divided into a plurality of independent units for housing the battery pack.

[0023] Optionally, the energy storage container further comprises a chiller, a primary pipeline, a secondary pipeline, and a tertiary pipeline, wherein the primary pipeline is connected to the chiller water inlet and chiller water outlet of the chiller, the secondary pipeline is connected to the primary pipeline, and the tertiary pipeline is connected between a plurality of the battery packs and the secondary pipeline, the primary pipeline is configured to transport coolant from the chiller to the secondary pipeline or to receive coolant from the secondary pipeline and transport it to the chiller, the secondary pipeline is configured to receive coolant from the primary pipeline and transport it to the tertiary pipeline or to receive coolant from the tertiary pipeline and transport it to the primary pipeline, and the tertiary pipeline communicates with a cooling channel in the battery box within the battery pack and is configured to receive coolant from the secondary pipeline and transport it to the cooling channel or to receive coolant exported from the cooling channel and transport it to the secondary pipeline.

[0024] Optionally, the energy storage container further comprises a firewall assembly, which is installed within the battery rack and arranged intersectingly along the longitudinal and lateral directions of the battery rack, and which is further provided with a fireproof and pressure release unit capable of forming a cold wall effect and a container wall effect.

[0025] Optionally, the fireproof and pressure relief unit includes a plurality of micropores, the micropores are through holes provided in the fireproof wall assembly, and the area of the projection of the through holes of the micropores in any plane perpendicular to the direction of the through holes of the micropores is 1 mm 2 or less.

[0026] Optionally, the fireproof wall assembly is used to be installed between two adjacent battery clusters, and includes a firewall between battery clusters used to be installed between two adjacent battery clusters each including a plurality of the battery packs, and a firewall between battery packs used to be installed between two adjacent battery packs. The area of the projection of the micropores on the firewall between battery clusters in any plane perpendicular to the direction of the through holes of the micropores is smaller than the area of the projection of the micropores on the fireproof wall between battery packs in any plane perpendicular to the direction of the through holes of the micropores.

[0027] Optionally, the battery rack includes a housing, a cluster frame provided in the housing for mounting the battery packs, and a plurality of card slots respectively provided in the cluster frame. The fireproof wall assembly engages with the cluster frame through the card slots.

[0028] This invention has the following advantages compared to the prior art. The technology of this invention achieves uniform flow distribution between multiple parallel cooling channels, and furthermore, the cooling medium in each of the multiple cooling channels can dissipate heat uniformly to each part of the battery module, resulting in a small temperature difference within the same battery module and between multiple battery modules, leading to high consistency in their lifespan and an overall reduction in the lifespan of the battery pack. Moreover, the multiple battery modules are installed in the mounting cavity of the box body, and several parallel cooling channels are installed in the bottom plate of the box body. These cooling channels are used to circulate the cooling medium, which can cool the multiple battery modules. The busbar and flow guide structure uniformly distribute the cooling medium through the parallel cooling channels, resulting in uniform cooling of the battery modules within the battery pack. Ultimately, this reduces the temperature difference between multiple battery modules within the battery pack, leading to high consistency in lifespan and an overall improvement in the lifespan of the battery pack. Furthermore, this battery box has a simple structure, is easy to process, has low manufacturing difficulty, is advantageous for improving production efficiency, and is low-cost.

[0029] A modification of the present invention involves positioning the busbar outside the mounting cavity. If coolant leaks from the busbar, the leaked coolant will be located outside the mounting cavity, thus protecting the battery located inside the cavity. Furthermore, the mounting slot formed by the interlocking of the housing and bottom plate protects the busbar, reducing damage to it during installation or transport and minimizing the risk of leakage due to collisions.

[0030] On the other hand, this invention uses micropores on the firewall as a flame suppression means. The micropores in the firewall prevent flames from passing through the firewall due to the cold wall effect and the container wall effect, thus suppressing the spread of flames. At the same time, the multiple micropores on the firewall also function as pressure release holes, allowing large amounts of gas generated by the fire to be discharged through the micropores, preventing the pressure inside the battery box from becoming too high and leading to more serious safety consequences.

[0031] Another modification of this invention is to further improve the safety of the battery by providing an aerosol fire extinguishing device inside the battery pack. Furthermore, the cooling effect of the battery module can be enhanced by providing a tertiary pipeline inside the container so that the chiller's coolant reaches the cooling channel inside the battery pack with a more uniform flow rate and velocity. [Brief explanation of the drawing]

[0032] The inclusion of drawings is intended to provide a further understanding of the present application; they are included and constitute part of the present application, illustrating embodiments of the present application and serving to explain the principles of the present application together with the specification. [Figure 1] This is a schematic diagram of the perspective view structure of the battery box according to the present invention. [Figure 2] This is a diagram illustrating the explosion of the battery box according to the present invention. [Figure 3] This is a schematic diagram of the base plate structure according to the present invention. [Figure 4] This is a schematic diagram of the internal structure of the busbar according to the present invention. [Figure 5] This is a schematic diagram of the structure of the battery box according to an embodiment of the present invention. [Figure 6] This is a diagram illustrating the explosion of a battery box according to an embodiment of the present invention. [Figure 7] This is a schematic diagram of the battery box (after removing the side frame and back frame) from a first viewpoint, according to an embodiment of the present invention. [Figure 8] This is a partially enlarged view of section A in Figure 7. [Figure 9] This is a schematic diagram of the lower battery box (after removing the side frame and back frame) from a second viewpoint, according to an embodiment of the present invention. [Figure 10] This is a magnified view of a portion of section B in Figure 9. [Figure 11] This is a schematic diagram of the liquid discharge structure according to an embodiment of the present invention. [Figure 12] This is a schematic diagram of the battery box (after removing the side frame and back frame) from a third viewpoint, according to an embodiment of the present invention. [Figure 13]Figure 12 is a cross-sectional view of the CC section. [Figure 14] This is a magnified view of a portion of section D in Figure 13. [Figure 15] This is a magnified view of a portion of point E in Figure 13. [Figure 16] This is a schematic diagram of a container-type energy storage battery compartment in the embodiment of the present invention. [Figure 17] This is a schematic diagram of the structure of the fire-resistant panel in the embodiment of the present invention. [Figure 18] This is a front view of the inter-battery cluster firewall in the present embodiment. [Figure 19] This is a top view of the firewall between battery clusters in the present embodiment. [Figure 20] This is a schematic diagram of the cluster frame structure in the present embodiment. [Figure 21] This is a top view of the battery rack in the present embodiment. [Figure 22] This is a front view of the battery rack in the embodiment of the present invention. [Figure 23] This is a top view of a partial structure of the battery rack in the present embodiment. [Figure 24] This is a schematic diagram of the battery pack in the present embodiment, specifically the aerosol fire extinguishing device located on its upper part. [Figure 25-27] This is a schematic diagram showing the arrangement of the chiller, primary pipeline, secondary pipeline, and tertiary pipeline in the energy storage container according to the embodiment of the present invention.

[0033] In Figures 1 to 4: 1 Bottom plate, 11 Inlet port, 12 Outlet port, 13 Main body, 14 Plug, 2 Housing, 21 Mounting plate, 211 Flat plate segment, 212 Bent plate segment, 22 First side plate, 221 Redundant section, 222 Reinforcement plate, 23 Flange, 3 Bus bar, 31 Housing, 32 Partition plate, 33 Outlet channel, 34 Inlet channel, 4 Inlet structure, 5 Outlet structure, 6 Mounting cavity, 7 Mounting slot, 8 Recess area.

[0034] In Figures 5 to 15: 100 Box body, 110 Bottom plate, 111 Inlet, 112 Outlet, 113 Partition rib, 1131 Sub-flow channel, 120 Front frame, 121 First through hole, 130 Rear frame, 140 Side frame, 200 Inlet structure, 210 Water inlet nozzle, 220 First flow collection block, 300 Outlet structure, 310 Water outlet nozzle, 320 Second flow collection block, 321 Second flow collection cavity, 400 Bus bar, 401 Second through hole, 410 Inlet channel, 411 Inlet channel port, 420 Outlet channel, 421 Outlet channel port, 510 Upper limit step, 520 Lower limit step, 5101 Mating connection surface.

[0035] In Figures 16 to 23: 61 battery rack, 611 housing, 612 cluster frame, 6121 card slot, 62 battery cluster, 621 battery pack, 63 firewall assembly; 631 firewall between battery clusters, 632 firewall between battery packs, 633 fireproof plate, 6331 through hole, 64 micro-hole.

[0036] In Figures 24-27: 70 Battery pack, 71 Aerosol fire extinguishing device, 72 Connecting wire, 73 Heat detection wire, 701 Insulation layer, 702 Buffer layer, 801 Chiller, 81 Primary conduit, 82 Secondary conduit, 83 Tertiary conduit, 84 Connection point (corrugated pipe segment design adopted) [Modes for carrying out the invention]

[0037] To more clearly illustrate the technology of the embodiments of this application, the drawings that may be used in the description of the embodiments are briefly described below. Obviously, the drawings in the following description are only some examples or embodiments of this application, and those skilled in the art may apply this application to other similar scenarios based on these drawings without expending any creative effort. Unless otherwise stated or made clear from the linguistic context, the same reference numerals in the figures represent the same structure or operation.

[0038] As shown in this application and claims, unless the context explicitly indicates an exception, words such as “one,” “a kind,” and / or “the said” can include plurals as well as singulars. Generally, the terms “equip” and “include” merely indicate that they include explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may include other steps and elements.

[0039] Unless otherwise specified in the drawings, the relative arrangements of components and steps, mathematical formulas, and numerical values ​​described in these embodiments are not intended to limit the scope of this application. Furthermore, for the sake of clarity, it should be understood that the dimensions of each part shown in the drawings are not based on actual proportional relationships. While technologies, methods, and apparatus known to the general articulate to those skilled in the relevant field may not be discussed in detail, where appropriate, such technologies, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as illustrative only, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. Similar symbols and letters represent similar terms in subsequent figures; therefore, if a term is defined in one figure, it does not need to be discussed further in subsequent figures.

[0040] In the description of this application, the orientations or positional relationships indicated by directional terms (such as "front, back, up, down, left, right," "side, up, vertical, horizontal," "ceiling, bottom," etc.) are generally orientations or positional relationships based on the drawings and are merely for the purpose of facilitating and simplifying the description of this application. Unless otherwise stated, these directional terms do not indicate or imply that the specified device or element must have a specific orientation or must be configured and operate in a specific orientation, and therefore cannot be understood as limitations on the scope of protection of this application. The directional terms "inside" and "outside" refer to the inside and outside relative to the contour of each part itself.

[0041] For the sake of clarity, spatial relative terms such as "above," "above," "on the top," and "on the top" can be used here to describe the spatial positional relationship between one device or feature and another device or feature, as shown in the figure. Spatial relative terms should be understood as meaning that the device is intended to include different orientations during use or operation other than the orientation described in the figure. For example, if the device in the drawing is upside down, it is described as a device "above another device or structure" or "on top of another device or structure," and then positioned as "below another device or structure" or "below another device or structure." Therefore, the exemplary term "above" could include two orientations: "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be appropriately interpreted.

[0042] Furthermore, the use of terms such as "first" and "second" to define parts is merely for the purpose of making them easier to distinguish, and unless otherwise declared, these terms have no special meaning and should not be understood as a limitation of the scope of protection of this application. In addition, while the terms used in this application are selected from commonly known terms, some terms referred to in this specification may be selected by the applicant at their discretion, and their detailed meanings are explained in the relevant sections described herein. Moreover, it is required to understand this application not only through the actual terms used, but also through the meanings contained in each term.

[0043] Referring to Figures 1 to 15, the present invention provides a battery box comprising: a bottom plate having several cooling channels provided inside for circulating a cooling medium; a housing commonly surrounding the bottom plate to form a mounting cavity; and a busbar installed at at least one end of the bottom plate, located inside or outside the mounting cavity, connected to the bottom plate, and communicating with the cooling channels. Here, Figures 1 to 4 show an embodiment in which the busbar is located outside the mounting cavity, while Figures 5 to 15 show an embodiment in which the busbar is located inside the mounting cavity. In both embodiments, uniform heat dissipation to the battery module can be achieved, enabling thermal management inside the battery pack and improving battery safety. In addition, the above two embodiments offer specific technical advantages in thermal management inside the battery pack. These will be described below.

[0044] First, referring to Figures 1 to 4, in order to solve the problem in the prior art where leaking coolant inside the battery box can easily come into contact with the batteries inside the battery box and cause a short circuit, the present invention provides a battery box that overcomes the problem in the prior art by placing the location where leakage may occur outside the housing cavity in the box body where the batteries are placed.

[0045] As shown in Figures 1 to 4, the battery box comprises a bottom plate 1, a housing 2, and a busbar 3. The housing 2 and the bottom plate 1 are commonly surrounded to form a mounting cavity 6 for mounting the battery, and several cooling channels are provided inside the bottom plate 1 for circulating a cooling medium. The busbar 3 is installed at least one end of the bottom plate 1, and the busbar 3 is located outside the mounting cavity 6, connected to the bottom plate 1 and communicating with the cooling channels.

[0046] Here, the first direction is the X direction in Figure 1, and the second direction is the Y direction in Figure 1.

[0047] Specifically, the cooling channel installed within the base plate 1 supplies a flow of coolant to cool the battery located in the mounting cavity 6, and also forms a circulation of the coolant within the cooling channel via the busbar 3. In this invention, the busbar 3 is installed on the base plate 1, and the installation position of the busbar 3 is outside the mounting cavity 6. As a result, if coolant leakage occurs, the part where the leakage occurs is outside the mounting cavity 6, so the leaked coolant does not damage the battery, and thus a protective effect on the battery in the battery box is achieved.

[0048] Furthermore, the provision in this application that a busbar 3 is installed at at least one end of the base plate 1 means that the busbar may be installed at one end of the base plate 1, or at both ends of the base plate 1. Specifically, the installation of the busbar 3 at one end of the base plate 1 means that the busbar 3 may be installed on the upper surface of the end region of the base plate 1 along the first direction, on the side surface of the end region of the base plate 1, or on both the upper surface and the side surface of the end region of the base plate 1. The specific installation position of the busbar 3 can be adaptively adjusted as needed.

[0049] In this embodiment, the method of installing the busbar 3 differs, but this embodiment provides two different embodiments.

[0050] In a specific embodiment not shown, busbars 3 are installed at both ends of the bottom plate 1 along the first direction, with one busbar 3 communicating with the liquid inlet end of the cooling channel and the other busbar 3 communicating with the liquid outlet end of the cooling channel.

[0051] Here, the coolant flows in one direction through the cooling channel supplied from the bottom plate 1, that is, the coolant flows in a first direction, enters the cooling channel through one of the busbars 3, and exits the cooling channel via the other busbar 3. By installing two busbars 3, it is advantageous to improve the flow efficiency of the coolant and, consequently, the heat dissipation efficiency. In the embodiments of the present invention, the specific installation method of the cooling channel in the bottom plate 1 is not limited. In one possible embodiment, a plurality of parallel cooling channels are installed in the bottom plate 1, and the busbars 3 communicate with the plurality of parallel cooling channels simultaneously. In this case, the path length of the coolant channel is shortened, and the cooling effect is improved.

[0052] In the specific embodiment shown in Figures 1 and 2, a busbar 3 is installed at one end of the bottom plate 1 along the first direction, communicating with the liquid inlet end and the liquid outlet end of the cooling channel, respectively.

[0053] Here, in order to achieve the technical effect of having a single busbar 3 that serves both as a coolant feeder and a return coolant, only one busbar 3 is installed on the bottom plate 1, and the busbar 3 communicates simultaneously with the coolant feeder and outlet ends of the cooling channel. By installing a single busbar 3, the flow of coolant is realized, the use of parts is reduced, and assembly efficiency is improved.

[0054] As shown in Figures 1 and 2, the housing 2 comprises a plurality of side plates and at least one mounting plate 21, with a mounting slot 7 formed between the mounting plate 21 and the bottom plate 1, and at least a portion of the busbar 3 housed inside the mounting slot 7.

[0055] Specifically, multiple side panels and mounting plates 21 are surrounded to form the housing 2.

[0056] Furthermore, there are at least two side plates and at least one mounting plate 21, and the illustrated housing 2 is not limited to a cubic structure consisting of side plates and mounting plates. The sum of the number of side plates and mounting plates 21 may be five, and the side plates and mounting plates 21 may form corresponding pentagonal cavities. Of course, the sum of the number of side plates and mounting plates 21 may be six, seven, or any other number, and the corresponding cavities may be surrounded by the corresponding side plates and mounting plates 21.

[0057] Furthermore, the structure of the mounting slot 7 may be such that the opening faces away from the bottom plate 1, or the opening faces towards the bottom plate 1, or the opening faces away from the mounting cavity 6, or the opening faces towards the mounting cavity 6.

[0058] In one specific embodiment of this model, the plurality of side plates include a second side plate and a mounting plate 21 spaced apart along a first direction, and two first side plates 22 spaced apart along a second direction perpendicular to the first direction, with the busbar 3 installed on the side of the mounting plate 21 away from the mounting cavity 6.

[0059] In this case, if busbars 3 are installed at both ends of the base plate 1, the second side plate is the mounting plate 21.

[0060] Furthermore, the busbar 3 is located on the outside of the mounting cavity 6 to prevent coolant from entering the mounting cavity 6 in case of a leak, thereby protecting the battery inside the mounting cavity 6.

[0061] Furthermore, along the height direction of the mounting plate 21, the mounting plate 21 includes sequentially formed flat plate segments 211 and bent plate segments 212, one end of the bent plate segment 212 is connected to the flat plate segment 211, and the other end of the bent plate segment 212 is bent toward the mounting cavity 6, forming a mounting slot 7 between the bent plate segment 212 and the bottom plate 1.

[0062] Here, a mounting slot 7 is formed in the connection area between the mounting plate 21 and the bottom plate 1, with the opening separated from the mounting cavity 6, and at least a portion of the bus bar 3 is housed inside the mounting slot 7. The bus bar 3 housed inside the mounting slot 7 is protected by the mounting plate 21, and furthermore, in the event of a collision, the external force acts on the mounting plate 21 rather than directly on the bus bar 3, thus reducing damage to the bus bar 3 during installation or transport and playing a role in protecting the bus bar 3.

[0063] When only one busbar 3 is installed on the base plate 1, a mounting slot 7 is formed only in the connection area between the mounting plate 21 and the base plate 1, with the opening away from the mounting cavity 6. When two busbars 3 are installed on the base plate 1, mounting slots 7 are formed in the connection areas between the two corresponding mounting plates 21, which are spaced apart along the first direction, and the base plate 1, with the openings away from the mounting cavity 6.

[0064] At least a portion of the busbar 3 is housed inside the mounting slot 7; that is, the entire busbar 3 may be housed inside the mounting slot 7, or a portion of the busbar 3 may be housed inside the mounting slot 7.

[0065] Specifically, the bus bar 3 extends along the second direction, and its projection on the first side plate 22 along the second direction does not exceed the first side plate 22, thereby providing protection for the bus bar 3 by the first side plate 22.

[0066] In this embodiment, when a portion of the busbar 3 is housed inside the mounting slot 7 along the first direction and the other portion of the busbar 3 is exposed outside the mounting slot 7, the first side plate 22 has a redundant portion 221 formed in the portion that extends outside the mounting plate 21 along the first direction, and the projected area of ​​the busbar 3 along the second direction is located within the redundant portion 221. The redundant portion 221 along the second direction is used to restrict and protect the busbar 3. The redundant portion 221 installed on two first side plates 22 that are spaced apart along the second direction provides positioning and protection for the busbar 3 in the second direction, and further enhances the stability and safety of the busbar 3 mounting.

[0067] Furthermore, if the entire busbar 3 is housed inside the mounting groove 7, the redundant section 221 does not need to be provided.

[0068] As shown in Figures 1 and 2, one end of the housing 2 that is separated from the bottom plate 1 has a flange 23 that extends toward the outside of the mounting cavity 6, and along the direction perpendicular to the bottom plate 1, the projected area of ​​the flange 23 on the bottom plate 1 includes the projected area of ​​the bus bar 3 on the bottom plate 1.

[0069] Specifically, the installation of flange 23 is advantageous for achieving a sealed connection, and the projection area of ​​flange 23 on the base plate 1 includes the projection of busbar 3 on the base plate 1, so flange 23 also has the effect of protecting busbar 3, further enhancing the stability of use of busbar 3.

[0070] In this embodiment, as shown in Figures 1 and 2, the plurality of side plates along the second direction include a first side plate 22 connected to both ends of the mounting plate 21, and a reinforcing plate 222 is installed at one end of the first side plate 22 closest to the bottom plate 1. The reinforcing plate 222 is installed on the side of the first side plate 22 away from the mounting cavity, and the reinforcing plate 222 protrudes toward the side away from the mounting cavity 6, forming a sandwich cavity between the reinforcing plate 222 and the first side plate 22.

[0071] Specifically, the reinforcing plate 222 and the first side plate 22 fit together to form a sandwich structure with a sandwich cavity. The installation of the sandwich structure is advantageous for increasing the connection strength between the first side plate 22 and the bottom plate 1, and the installation of the reinforcing plate 222 is also advantageous for lifting the entire battery box. The reinforcing plate is equipped with lifting holes or ear-hook structures for lifting.

[0072] Furthermore, a reinforcing beam is provided on the side of the first side plate 22 away from the mounting cavity, and the reinforcing beam extends along the first direction. Providing the reinforcing beam makes it easier to reinforce the strength of the first side plate 22, increases the overall strength of the frame, enhances the stability of the entire battery box, and is advantageous in better protecting the batteries inside the battery box.

[0073] Furthermore, one or more reinforcing beams are installed, and if multiple reinforcing beams are installed, they are spaced apart in the height direction of the first side plate 22.

[0074] In this embodiment, when the busbar 3 is installed at one end of the bottom plate 1, the bottom plate 1 is further provided with an inlet 11 and an outlet 12 that communicate with the cooling channel, and the busbar 3 has an inlet channel 34 and an outlet channel 33 that are spaced apart along the first direction, with the inlet channel 34 communicating with the inlet 11 and the outlet channel 33 communicating with the outlet 12.

[0075] Here, the fluid inlet 11 installed on the bottom plate 1 communicates with the fluid inlet passage 34 in the bus bar 3, the fluid outlet 12 installed on the bottom plate 1 communicates with the fluid outlet passage 33 in the bus bar 3, the fluid inlet passage 34 communicates with the fluid outlet passage 33 via the cooling passage, and the flow of coolant is completed by fluid inlet through the fluid inlet passage 34 and fluid outlet through the fluid outlet passage 33. In other words, the coolant flows into the cooling passage via the fluid inlet passage 34, and the coolant inside the cooling passage flows out from the fluid outlet passage 33, thus completing the flow of coolant.

[0076] Furthermore, the busbar 3 comprises a housing 31 and a partition plate 32, the partition plate 32 being installed inside the housing 31 and positioned along a second direction perpendicular to the first direction, dividing the inside of the housing 31 into an inflow channel 34 and an outflow channel 33.

[0077] The partition plate 32 divides the busbar 3 into an inflow channel 34 and an outlet channel 33, dividing the internal region of the busbar 3 into two parts. When coolant flows, the coolant inside the inflow channel 34 and the outlet channel 33 does not communicate with each other, further preventing mixing of the coolant and ensuring that the coolant flows sequentially through the inflow channel 34, the cooling channel, and the outlet channel 33, thereby achieving liquid cooling circulation of the coolant.

[0078] In this embodiment, the battery box further includes a flow guide structure, which includes a male end installed on the busbar 3 and a female end installed on the bottom plate 1, with the male and female ends mated together, and the flow guide structure ensures that the cooling medium flows uniformly into several cooling channels. Providing the flow guide structure is advantageous in improving the smoothness and uniformity of the cooling medium flow, and consequently in improving the liquid cooling efficiency.

[0079] The fluid inlet channel 34 of the busbar 3 has a fluid inlet port that corresponds one-to-one with the fluid inlet port 11 installed on the bottom plate 1, and the fluid inlet port and the fluid inlet port 11 enable communication between the cooling channel in the bottom plate 1 and the fluid inlet channel 34 in the busbar 3. The fluid inlet channel 33 of the busbar has an outlet channel that corresponds one-to-one with the outlet port 12 installed on the bottom plate 1, and the outlet channel and the outlet port 12 enable communication between the cooling channel in the bottom plate 1 and the outlet channel 33 in the busbar 3.

[0080] The male end of the flow guide structure is installed at the inlet or outlet of the busbar 3, and may be, for example, an upper limit step installed circumferentially around the inlet or outlet. The female end of the flow guide structure is installed at the inlet or outlet of the bottom plate, and may be, for example, a lower limit step recessed at a position corresponding to the upper limit step of the inlet or outlet. The upper limit step and the lower limit step are inserted through each other to form a mating connection surface, and the upper limit step introduces the cooling medium into the cooling channel.

[0081] As shown in Figures 1 to 4, the battery box further comprises a fluid feeding structure 4 communicating with a fluid feeding channel 34 and a fluid outlet structure 5 communicating with a fluid outlet channel 33, and the fluid feeding structure 4 and the fluid outlet structure 5 are spaced apart in a second direction perpendicular to the first direction.

[0082] Here, the fluid feeding structure 4 and the fluid dispensing structure 5 are cartridges.

[0083] Furthermore, the fluid inflow structure 4 and the fluid outflow structure 5 are connected to an external pipeline so that the coolant can easily enter the busbar 3 and the circulated coolant can flow out from inside the busbar 3.

[0084] Furthermore, the housing 2 has a retraction area 8 that accommodates the fluid feeding structure 4 and the fluid discharge structure 5, and the retraction area 8 is in communication with the mounting slot 7.

[0085] Here, the retraction area 8 provides the arrangement of the fluid-feeding structure 4 and the fluid-discharged structure 5 such that the fluid-feeding structure 4 and the fluid-discharged structure 5 are located inside the retraction area 8. The retraction area 8 serves to protect the fluid-feeding structure 4 and the fluid-discharged structure 5, reducing damage to them during installation or transport.

[0086] In this embodiment, the bottom plate 1 comprises a main body 13 having a cooling channel inside, and plugs 14 installed at both ends of the main body 13 along a first direction.

[0087] Of these, the plug 14 blocks the cooling passage inside the bottom plate 1, preventing coolant from leaking into the bottom plate 1 itself, thereby enhancing the protective effect on the battery.

[0088] Specifically, the plug 14 has an extension portion that extends into the cooling channel and a stopper portion that contacts the main body 13, and the extension portion and the stopper portion are fitted together to form a T-shape. By extending the extension portion into the cooling channel, a good sealing effect can be achieved, and consequently, the occurrence of liquid leakage can be avoided.

[0089] In this embodiment, the base plate 1 and the housing 2 are fixed together by welding, and the busbar 3 and the base plate 1 are fixed together by welding.

[0090] Specifically, the base plate 1 and the housing 2 can be connected by stir friction welding or arc welding, and the connection between the main body 13 of the base plate 1 and the plug 14 can be connected by stir friction welding to enhance the sealing effect and stability of the connection.

[0091] Furthermore, the busbar 3, the fluid feeding structure 4, and the fluid outlet structure 5 are connected together by laser welding or arc welding, and then this whole structure is connected to the bottom plate 1 by welding, providing a sealing effect that enhances the stability of the connection.

[0092] Unlike the embodiments described above, in a preferred embodiment of the present application, at least a portion of the busbar 3 along the first direction is located outside the flange 23.

[0093] Specifically, the mounting plate 21 has a flange 23 at one end away from the bottom plate 1, the first side plate 22 extends outward from the flange 23 along the first direction, and at least a portion of the bus bar 3 is located outside the flange 23.

[0094] Based on the above description, this application provides a battery pack including a battery box of any of the embodiments described above. The battery box contains batteries, and the present embodiment is not limited to a specific embodiment in which the batteries are installed inside the battery box.

[0095] From the above description, it can be seen that the above-described embodiment of the present application achieves the following technical effects: 1. Because the busbar 3 is installed outside the mounting cavity 6, if coolant leaks from inside the busbar 3, the leaked coolant is located outside the mounting cavity 6, and therefore does not affect the battery located inside the mounting cavity 6, thus protecting the battery. 2. The mounting slot 7 formed by the fitting of the mounting plate 21 and the bottom plate 1 protects the busbar 3, reduces damage to the busbar 3 during installation or transport, and reduces the risk of leakage due to collision.

[0096] As shown in Figures 5 to 8, this embodiment provides a battery box comprising a box body 100, bus bars 400, and a flow guide structure. Here, the box body 100 includes a bottom plate 110 and a housing, and the bottom plate 110 and housing are surrounded to form a mounting cavity for mounting battery modules or groups of battery cells. Multiple battery modules are installed, and several parallel cooling channels are provided within the bottom plate 110 for circulating a cooling medium, which can cool the battery modules.

[0097] As an option, the housing is equipped with a fluid inlet structure 200 and a fluid outlet structure 300, a busbar 400 is attached to the bottom plate 110, a busbar cavity is formed inside the busbar 400, the busbar cavity is divided into a fluid inlet channel 410 and a fluid outlet channel 420, one end of the fluid inlet channel 410 is in communication with the fluid inlet structure 200, the other end of the fluid inlet channel 410 is in communication with the fluid inlet ports 111 of several parallel cooling channels, one end of the fluid outlet channel 420 is in communication with the fluid outlet ports 112 of several parallel cooling channels, and the other end of the fluid outlet channel 420 is in communication with the fluid outlet structure 300. As a result, the cooling medium can enter the fluid inlet channel 410 from the fluid inlet structure 200, then the cooling medium in the fluid inlet channel 410 is divided and enters each of the parallel cooling channels, circulates through the cooling channels and then merges into the fluid outlet channel 420, and then both flow out from the fluid outlet structure 300.

[0098] Furthermore, the flow guide structure comprises a male end installed on the busbar 400 and a female end installed on the bottom plate 110, and the male and female ends are mated together. This flow guide structure allows the cooling medium inside the busbar 400 to flow uniformly into several parallel cooling channels. As a result, by installing the busbar 400 and the flow guide structure, uniform distribution of flow between multiple parallel cooling channels is achieved, and the cooling medium in each of the multiple cooling channels can dissipate heat uniformly to each part of the battery module. This reduces the temperature difference inside the same battery module and between multiple battery modules, improves the consistency of their lifespan, and can reduce the overall lifespan of the battery pack.

[0099] Optionally, the housing in this embodiment comprises a front frame 120, a rear frame 130, and two side frames 140, the front frame 120 and rear frame 130 being positioned opposite each other and located at both ends of the bottom plate 110 in the longitudinal direction, and the two side frames 140 being positioned opposite each other and located at both ends of the bottom plate 110 in the width direction. In some embodiments, the front frame 120, rear frame 130, and two side frames 140 can be integrally molded. Naturally, in other embodiments, the front frame 120, rear frame 130, and two side frames 140 can also be connected by welding.

[0100] Furthermore, both the bottom plate 110 and the bus bar 400 can be manufactured using profile material. For example, in this embodiment, the bottom plate 110 is manufactured by joining two profile materials, and two cavities are formed inside each profile material. By closing both ends of the cavities, each cavity constitutes a closed cooling channel, that is, a total of four cooling channels are installed inside the bottom plate 110. Each cooling channel includes a deflow channel and a recirculation channel, both of which are installed along the longitudinal direction of the bottom plate 110. One end of the deflow channel is an inlet 111, which communicates with the inlet channel 410, and one end of the recirculation channel is an outlet 112, which communicates with the outlet channel 420. The other end of the deflow channel and the other end of the recirculation channel communicate with each other at one end away from the bus bar 400 so that the deflow channel and the recirculation channel form a complete cooling circuit. Similarly, two cavities are provided inside the busbar 400, which is made of profile material, forming an inflow channel 410 and an outflow channel 420, respectively. Both ends of the cavities are sealed to close the inflow channel 410 and the outflow channel 420. Exemplarily, both ends of the cavities may be sealed with sealing members such as rubber blocks, but of course other forms of sealing may be selected, and this embodiment is not limited thereto.

[0101] As an alternative embodiment, partition ribs 113 are installed in the cooling channel of the bottom plate 110, and the partition ribs 113 divide the cooling channel into several subchannels 1131, that is, the deflow passage includes several subchannels 1131 and the return passage includes the same number of subchannels 1131, so that the cooling medium can continue to be divided even after entering the cooling channel through the liquid inlet 411, further improving the uniformity of the division, which is advantageous for uniform heat dissipation of the battery module.

[0102] Referring again to Figures 9 and 10, the busbar 400 is installed inside the mounting cavity, and is positioned close to the front frame 120. The front frame 120 has two first through-holes 121, and the fluid feeding structure 200 and the fluid outlet structure 300 are installed passing through the two first through-holes 121, thereby allowing the fluid feeding structure 200 to communicate with the fluid feeding passage 410 of the busbar 400, and the fluid outlet structure 300 to communicate with the fluid outlet passage 420 of the busbar 400. Alternatively, referring to Figure 8, the upper wall surface of the busbar 400 has two second through-holes 401, one of which connects the fluid feeding structure 200 to the fluid feeding passage 410, and the other second through-hole 401 connects the fluid outlet structure 300 to the fluid outlet passage 420.

[0103] For example, the bottom wall of the busbar 400 is provided with four fluid inlet ports 411 and four fluid outlet ports 421, which are arranged alternately. All four fluid inlet ports 411 communicate with four fluid inlet channels 410, and all four fluid outlet ports 421 communicate with four fluid outlet channels 420. The fluid inlet ports 411 and fluid outlet ports 421 correspond one-to-one with the cooling channels, and the fluid inlet ports 411 and fluid outlet ports 421 are arranged in an intersecting manner. Each fluid inlet port 411 communicates with a fluid inlet 111 of one cooling channel, and each fluid outlet port 421 communicates with a fluid outlet 112 of the corresponding cooling channel.

[0104] Referring to Figures 9 and 11, the fluid intake structure 200 in this embodiment comprises a water intake nozzle 210 and a first flow concentrator block 220. The water intake nozzle 210 is drilled in a first through hole 121 of the front frame 120, and the first flow concentrator block 220 is connected to the bus bar 400. One end of the first flow concentrator block 220 communicates with the water intake nozzle 210, and the other end of the first flow concentrator block 220 communicates with the fluid intake channel 410 through a second through hole 401 within it. A first flow concentrator cavity is formed inside the first flow concentrator block 220. When the cooling medium enters the fluid intake channel 410 of the bus bar 400 through the fluid intake structure 200, the first flow concentrator cavity acts as a buffer for the turbulent portion of the cooling medium, reducing its flow velocity. This makes the flow more uniform when the bus bar 400 is divided, which is advantageous for uniform heat dissipation. Similarly, the discharge structure 300 comprises a water discharge nozzle 310 and a second flow concentrator block 320, the water discharge nozzle 310 being drilled in another first through hole 121 of the front frame 120, the second flow concentrator block 320 being connected to the bus bar 400, one end of the second flow concentrator block 320 communicating with the water discharge nozzle 310, and the other end of the second flow concentrator block 320 communicating with the discharge flow channel 410 through another second through hole 401, and a second flow concentrator cavity 321 being formed inside the second flow concentrator block 320. When the cooling medium after heat exchange enters the discharge structure 300 of the bus bar 400 through the discharge flow channel 420, the second flow concentrator cavity 321 similarly acts as a buffer for the turbulent portion of the cooling medium, reducing its flow velocity, thereby extending the heat exchange time and enhancing the cooling effect.

[0105] Furthermore, the volume of the busbar cavity within the busbar 400 is V1, that is, the total volume of cooling medium that can be accommodated in the incoming fluid channel 410 and the outgoing fluid channel 420 is V1, the total volume of the four parallel cooling channels is V2, that is, the total volume of cooling medium that can be accommodated in the four cooling channels is V2, and the range of the value of V1 / V2 is 0.05 to 0.06, for example, the value of V1 / V2 may be 0.05, 0.1, 0.2, 0.3, 0.4, 0.5 or 0.6, etc. This ensures that the busbar cavity of the busbar 400 has enough cooling medium to be distributed into the four cooling channels.

[0106] As an option, referring to Figures 12 to 15, in this embodiment, the male end of the flow guide structure is the upper limit stage 510, and the female end of the flow guide structure is the lower limit stage 520. The upper limit stage 510 is generally elliptical and is installed circumferentially on the edges of the liquid inlet 411 and the liquid outlet 421. The lower limit stage 520 is generally elliptical and is recessed circumferentially on the liquid inlet 111 and the liquid outlet 112 of the cooling channel on the bottom plate 110. The upper limit stage 510 and the lower limit stage 520 can match each other and be inserted through each other to connect, and the upper limit stage 510 and the lower limit stage 520 are inserted through each other to form a fitting connection surface 5101, and the upper limit stage 510 can introduce the cooling medium into the cooling channel. Since the upper limit stage 510 extends the length of the liquid inlet 411 or the liquid outlet 421, it is advantageous for guiding the cooling medium and making the flow distribution uniform. Naturally, in addition to their role in guiding the flow, the installation of the upper and lower limit stages 510 and 520 is also advantageous for positioning the busbar 400. This makes it easier to align the fluid inlet 411 of the busbar 400 with the fluid inlet 111 of the cooling channel, and to align the fluid inlet 421 of the busbar 400 with the fluid outlet 112 of the cooling channel during assembly. This avoids causing uneven flow distribution due to a reduction in the cross-sectional area of ​​the cooling medium flow caused by mutual shielding. Furthermore, the flow guidance structure is simple in structure, easy to process, and reduces the difficulty of production and manufacturing, thereby increasing production efficiency and contributing to some cost reduction.

[0107] Optionally, the upper step 510 includes a first vertical surface, a second horizontal surface, and a second vertical surface, along the width direction of the lower step 520, with a mating connection surface 5101 formed between the first horizontal surface and the lower step 520, a first cap a between the first vertical surface and the lower step 520, and a second gap b between the second vertical surface and the lower step 520, the first gap a located on one side of the mating connection surface 5101 and the second gap b located on the other side of the mating connection surface 5101, the installation of the first gap a and the second gap b can compensate for manufacturing tolerances of the upper step 510 and the lower step 520, thereby facilitating mating and mounting of the upper step 510 onto the lower step 520. For example, the range of values ​​for both the first gap a and the second gap b is 0.05 mm to 6 mm, and the range of values ​​for the width of the mating connection surface 5101 is 0.5 mm to 12 mm. For example, the first gap a and the second gap b can be 0.05 mm, 0.1 mm, 0.5 mm, 0.8 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or 6 mm. The width of the mating connection surface 5101 can be 0.5 mm, 0.8 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, and these will not be listed individually here.

[0108] Furthermore, a third gap c exists between the partition rib 113 and the end of the upper stage 510 along the height direction of the bottom plate 110. The placement of this third gap c ensures that the first horizontal surface of the upper stage 510 and the lower stage 520 abut each other to form a fitting connection surface 5101. This ensures a tight seal between the upper stage 510 and the lower stage 520, blocking the flow of the cooling medium and preventing large amounts of the cooling medium from overflowing from between them, resulting in good sealing. Exemplary examples show that the range of values ​​for the third gap c is 0.05 mm to 10 mm. For example, the third gap c can be 0.05 mm, 0.1 mm, 0.5 mm, 0.8 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm, which are not listed here.

[0109] Furthermore, this embodiment provides a battery pack including multiple battery modules and the battery box described above. The battery box comprises a box body 100, bus bars 400, and a flow guide structure. The bottom plate 110 and housing of the box body 100 are surrounded to form a mounting cavity, and the multiple battery modules are installed in the mounting cavity. Several parallel cooling channels are installed inside the bottom plate 110, and the cooling channels are used to circulate a cooling medium, which can cool the multiple battery modules. The bus bars 400 uniformly distribute the cooling medium through the parallel cooling channels, thereby uniformly cooling the battery modules in the battery pack. As a result, the temperature difference between the multiple battery modules in the battery pack is small, the lifespan consistency is high, and the overall lifespan of the battery pack is improved.

[0110] The male and female ends of the flow guide structure are interlocked and fitted together as a single unit in a stepped shape, thereby achieving good flow guidance. This allows for more uniform distribution of the cooling medium as it enters the outlets 111 of the multiple parallel cooling channels from the input channel 410 of the bus piece 400. Furthermore, the male and female ends of the flow guide structure ensure precise positioning between the bus bar 400 and the bottom plate 110, preventing large amounts of cooling medium from overflowing. This also reduces manufacturing difficulty, is advantageous for improving production efficiency, and results in lower costs.

[0111] In addition to the battery box configuration described above, another embodiment of the present invention provides a battery pack comprising a plurality of batteries and the battery box of any of the embodiments described above, adapted to house one or more batteries in each battery box.

[0112] More preferably, referring to Figure 24, the battery pack 70 in this preferred embodiment further comprises an aerosol fire extinguishing device 71 and a battery management system (located inside the battery pack 70).

[0113] In this embodiment, an aerosol fire extinguishing device 71 is positioned on top of the battery pack 70. This aerosol fire extinguishing device 71 detects fires using a probe line arrangement and synchronizes fire extinguishing. It is even more preferable that an insulating layer 701 is installed above the batteries inside the battery pack 70. The insulating layer may be a mica sheet, or other insulating material such as PP or PI. The aerosol fire extinguishing device 70 is positioned above the insulating layer. Preferably, a buffer layer 702 is also installed between the insulating layer 701 and the aerosol fire extinguishing device 71 (the buffer layer 702 is also an insulating material and has a certain degree of buffering effect, which is used to buffer vibrations during transport of the aerosol fire extinguishing device 71 and protect the aerosol fire extinguishing device 71). As shown in Figure 24, one side of the aerosol fire extinguishing device 71 is connected to the buffer layer 702, and the other side is connected to the battery pack top cover (not shown).

[0114] As shown in Figure 24, the heat sensing wire 73 drawn out by the aerosol fire extinguishing device 71 extends over a wide area on the insulating layer 701, and any node of the heat sensing wire 73 can detonate the aerosol fire extinguishing device 71 when the temperature exceeds a set value. Inside the aerosol fire extinguishing device 71, there is a state feedback device connected to the battery management system BMS by a connection line 72 for feeding back to the BMS whether or not the aerosol fire extinguishing device 71 has been activated. Specifically, the state feedback device is suitable for providing the battery management system BMS with a state quantity indicating whether or not the aerosol fire extinguishing device 71 has been activated. After the BMS receives information to activate the aerosol fire extinguishing device 71, it provides a warning signal to prompt the driver to check the status.

[0115] However, this application is not limited to Figure 24, and in other embodiments, the aerosol fire extinguishing device 71 may be positioned on one side of the multiple batteries inside the battery pack 70, for example, side A as shown in Figure 24. When the aerosol fire extinguishing device 71 is positioned on the side, an insulating layer is provided between the side of the multiple batteries and the aerosol fire extinguishing device 71, and the aerosol fire extinguishing device 71 is secured by a buffer bracket. Specifically, the battery pack 70 includes a battery housing space and an electrical element housing space, with a mounting beam between them, and the aerosol fire extinguishing device 71 can be connected to the insulating layer via the mounting beam inside the battery pack 70. It will be understood that, depending on the actual structure inside the battery pack, those skilled in the art can fine-tune the method of securing the aerosol fire extinguishing device 71.

[0116] In another embodiment of the present application, an energy storage container is also provided, comprising a battery rack divided into multiple independent units for housing battery packs. Exemplaryly, these battery packs may be the battery packs in any of the embodiments described above, and hereby include the battery packs in any of the embodiments described above of the present application.

[0117] In a preferred embodiment of the present invention, with reference to Figures 25-27, a preferred energy storage container is provided which is equipped with a tertiary cooling pipeline design that facilitates thermal management. According to Figure 25, the energy storage container (in order to more clearly illustrate the tertiary pipeline, the structure of the battery shelf is omitted in Figure 25, leaving only the components related to thermal management) comprises a chiller 801, a primary pipeline 81, a secondary pipeline 82, and a tertiary pipeline 83. Based on this, Figures 26 and 27 show the above structure in separate diagrams, where Figure 26 shows the chiller 801 and the primary pipeline 81, and Figure 27 shows the secondary pipeline 82 and the tertiary pipeline 83.

[0118] Specifically, the primary pipeline 81 connects the chiller water inlet and chiller water outlet of the chiller 801. The water inlet of the primary pipeline 81 transports the coolant to the water inlet of the secondary pipeline 82, and the coolant heated in the water outlet of the secondary pipeline 82 is transported back to the water outlet of the primary pipeline 81, and finally returned to the chiller 801.

[0119] Even more preferable is that the primary pipeline 81 and the chiller water inlet and chiller outlet of the chiller 801 are connected by a chuck system, and the multiple sections of the primary pipeline 81 are connected to each other by a chuck system (relying on fasteners and links), so that pipeline connections are achieved by mechanical structures instead of welding. By adopting such a connection method, the problem of pipelines being too long and difficult to install can be avoided, and quick attachment and detachment can be achieved.

[0120] In this embodiment, the energy storage container contains multiple battery clusters, and the secondary pipeline 82 is used as a cooling liquid outlet pipeline for the battery clusters. The water inlet and outlet pipelines of the secondary pipeline 82 are installed on both sides of the battery cluster, respectively, to ensure smooth water flow in and out of the battery cluster. In this embodiment, it is preferable to adopt a stroke equalization design to guarantee uniformity of water flow and improve the pipeline efficiency of the battery system. According to Figure 25, the battery cluster can be understood as a single cluster battery pack formed from multiple battery packs within a space formed by the common constraint of the secondary pipeline 82 and the primary pipeline 81.

[0121] Furthermore, the tertiary conduits 83 are specifically the inlet and outlet conduits for the battery packs, and the specific number of tertiary conduits 83 corresponds to the number of battery packs. The tertiary conduits 83 also employ an equal flow path equalization design to ensure a uniform distribution of water flow inside the battery packs and improve the consistency of the battery cooling water flow rate. In this embodiment, the equal flow path equalization design means that within each cluster of battery packs, the conduit distance through which the cooling liquid flows is consistent. The tertiary conduits 83 circulate with the cooling passages in the battery boxes within each connected battery pack, thereby transporting the cooling liquid into the battery packs and achieving a cooling effect.

[0122] To facilitate understanding, this embodiment exemplifies a case where the chiller water inlet and chiller outlet of the chiller are both located at the bottom of the unit, the water inlet of the primary pipeline 81 is at the bottom, and the water outlet of the primary pipeline 81 is at the top. The coolant flows through the lower primary pipeline 81 into the water inlet of the secondary pipeline 82, then sequentially flows through the water inlet of the tertiary pipeline 83 of the lowest battery pack into that battery pack, flows from the corresponding water outlet of the tertiary pipeline 83 of this battery pack into the water outlet of the secondary pipeline 82, and through the secondary pipeline 82 merges with the primary pipeline 81 above the battery cluster.

[0123] In this embodiment, preferably, referring to Figure 27, the pipe connection section 84 adopts a corrugated pipe segment design. Corrugated pipe segments are pipe materials with a regularly wavy outer shape, which are softer than straight pipes, solving stress problems at the connection point and enhancing connection stability and durability. In this embodiment, the corrugated pipe segment design can be placed at any of the locations of the primary pipe 81, secondary pipe 82, and tertiary pipe 83, particularly at the connection points between pipes.

[0124] A preferred embodiment of the energy storage container of the present invention will be described in more detail below, with reference to Figures 16-23. In related technologies, when a fire occurs in a battery pack within a battery compartment, it is difficult for the fire prevention system between battery packs to simultaneously prevent the spread of the fire and release pressure. Therefore, if a thermal runaway occurs in a single battery pack within a battery compartment, it affects other battery packs and increases losses. To address the above problem, the present invention provides an energy storage container equipped with a battery rack 61 and a firewall assembly 63, as shown in Figure 16.

[0125] Within the battery rack 61, multiple battery clusters 62 can be installed. It should be explained that a single battery cluster 62 means a battery module in which multiple battery packs are formed in series and / or parallel. The firewall assembly 63 is located within the battery rack 61 and is positioned to intersect the battery rack 61 in the longitudinal and transverse directions, dividing the battery rack 61 into multiple independent units for housing the battery packs 621. Furthermore, the firewall assembly 63 is provided with a fireproof and pressure release unit capable of forming a cold wall effect and a container wall effect.

[0126] For convenience, in this application, the battery pack 621 in the battery cluster 62 shown in Figure 16 is not installed.

[0127] Preferably, as shown in Figure 18, the fire protection and pressure release unit comprises a plurality of micropores 64, the micropores 64 being through holes provided in the fire-resistant wall assembly 63, and the projected area of ​​each micropore 64 in any plane perpendicular to the direction of the through hole 64 is 1 mm². 2 The following applies:

[0128] Furthermore, the micropores 64 utilize the cold wall effect and the container wall effect to prevent the spread of flames. Here, the cold wall effect is achieved by the micropores 64 increasing the contact area between the fine flames and the wall surface of the firewall module 63, thereby increasing the thermal conductivity of the material and increasing the heat loss of the flames. This lowers the flame temperature to below its extinction temperature as quickly as possible, thus achieving the objective of preventing the fire from spreading. The principle of the container wall effect is that when combustion occurs under the excitation of external energy (thermal energy, radiant energy, electrical energy, chemical reaction energy, etc.), molecular bonds are broken and active molecules are generated. These active molecules then undergo chemical reactions and split into active radicals. These active radicals collide with other molecules to produce new products (combustion) and simultaneously generate new radicals, which continue to react with other molecules. On the other hand, the micropores 64 function as a flame suppression means. The small size of the micropores 64 in the firewall assembly 63 reduces the probability of collisions between radicals and reactive molecules, while conversely increasing the probability of collisions between radicals and the wall surface of the firewall assembly 63, thus promoting a reduction in radical reactions. Therefore, after reducing the area of ​​the passage dimensions of the micropores 64 to some extent, the objective of preventing the spread of fire can be achieved. The projected area of ​​the micropores 64 in the firewall assembly 63 in any plane perpendicular to the direction of the through-holes of the micropores 64 is 1 mm². 2 Setting the parameters as follows will prevent the flame from spreading to the adjacent battery pack 621. At the same time, as shown in Figures 16 and 17, the firewall assembly 63 is provided with numerous micropores 64, which allow the pressure within the storage space surrounded by the firewall assembly 63 to be released in a timely manner.

[0129] Specifically, the firewall assembly 63 comprises a firewall 631 between battery clusters and a firewall 632 between battery packs.

[0130] Among these, the inter-battery cluster firewall 631 is used to be erected between two adjacent battery clusters 62. The inter-battery pack firewall 632 is used to be erected between two adjacent battery packs 621 within either battery cluster 62. Here, both the inter-battery cluster firewall 631 and the inter-battery pack firewall 632 include a plurality of fireproof plates 633 stacked in the thickness direction, each of which is provided with a plurality of through holes 6331, and the through holes 6331 between the plurality of different fireproof plates 633 stacked in the thickness direction are at least partially offset so that they overlap each other to form micropores 64.

[0131] As shown in Figures 16, 17, 18, and 19, assuming that both the inter-battery cluster fireproofing wall 631 and the inter-battery pack fireproofing wall 632 contain only one fireproofing plate 633 in order to reduce the difficulty of the process and enable mass production, it can be understood that simultaneously creating multiple micropores 64 in a single fireproofing plate 633 while meeting the strength requirements of the fireproofing plate 633 is undoubtedly a major challenge for process production. On the other hand, in this application, as shown in Figures 17 and 19, both the inter-battery cluster fireproof wall 631 and the inter-battery pack fireproof wall 632 include a plurality of fireproof plates 633 stacked in the thickness direction, each fireproof plate 633 is provided with a plurality of through-holes 6331, and the projected area of ​​each through-hole 6331 in any plane perpendicular to the direction of the through-hole is larger than the projected area of ​​the micro-hole 4 in any plane perpendicular to the direction of the through-hole, thereby reducing the difficulty of process manufacturing a single fireproof plate 633. Subsequently, the plurality of fireproof plates 633 are stacked and the through-holes 6331 on different fireproof plates 633 are offset from each other so that these through-holes 6331 overlap to form micro-holes 64. Alternatively, the shape of the through-holes 6331 is always triangular. Of course, employees can change the shape of the through-holes 6331 as needed.

[0132] Preferably, the material for the fireproof panel 633 can be a polycrystalline mullite ceramic fiberboard. The main crystalline phase of polycrystalline mullite fiber is a single mullite phase, and among polycrystalline alumina fibers, it is the type that is used at high temperatures and has the best thermal stability. Its operating temperature is 1400°C or higher, which is sufficient to meet the need to block flames in the event of a fire in the battery pack 621.

[0133] In some specific embodiments, a single battery cluster 62 includes eight battery packs 621 spaced apart vertically, as shown in Figure 16. In the embodiments provided by the present invention, a battery compartment includes ten battery clusters 62, and two battery clusters 62 in the front-to-back direction in the figure are in a single row. A battery cluster firewall 631 is provided between adjacent battery clusters 62. A battery pack firewall 632 is provided between adjacent battery packs 621 (i.e., battery packs 621 spaced apart vertically within the same cluster).

[0134] It should be considered that the intensity of a fire when the entire battery cluster 62 catches fire will differ from the intensity of a fire when a single battery pack 62 catches fire. In this application, the thickness of the inter-battery cluster firewall 631 is greater than the thickness of the inter-battery pack firewall 632. Specifically, the thickness of the inter-battery cluster firewall 631 is 10 mm to 100 mm. The thickness of the inter-battery pack firewall 632 is 5 to 100 mm.

[0135] As an alternative embodiment, the present invention provides an example in which the thickness of the firewall 632 between battery packs is 24 mm and the thickness of the firewall 631 between battery clusters is 48 mm.

[0136] Optionally, the inter-battery cluster firewall 631 comprises 1 to 100 layers of the fireproof plates 633, and the inter-battery pack firewall 632 comprises 1 to 50 layers of the fire-blocking plates 633, each of which contains a layer of polycrystalline mullite ceramic fiberboard. Naturally, the projected area of ​​the micropores 64 in any plane perpendicular to the through-hole direction of the micropores 64 decreases in proportion to the number of layers of the fireproof plates 633. The projected area of ​​the micropores 64 on the inter-battery cluster firewall 631 in any plane perpendicular to the through-hole direction of the micropores 64 is smaller than the projected area of ​​the micropores 64 on the inter-battery pack fire-blocking wall 632 in any plane perpendicular to the through-hole direction of the micropores 64.

[0137] In some embodiments, the inter-battery cluster firewall 631 comprises 24 layers of firewalls 631, and the inter-battery pack firewall 632 comprises 12 layers of firewalls 633.

[0138] In some preferred embodiments, each of the through-holes 6331 on the fireproof board 633 has a projected area of ​​5 to 100 mm² in any plane perpendicular to the direction of the through-hole 6331. 2 Between these, the multiple fireproof boards 633 are stacked on top of each other such that the through holes 6331 on the multiple fireproof boards 633 are superimposed on each other in the direction of the through holes 6331 to form micropores 64.

[0139] Furthermore, as shown in Figures 16, 20, 21, 22, and 23, the battery rack 61 comprises a housing 611, a cluster frame 612 provided within the housing 611 for mounting the battery packs 621, and a plurality of card slots 6121 provided on the cluster frame 612. The firewall assembly 63 engages with the cluster frame 612 via the card slots 6121. The card slots 6121 are used to engage with the inter-battery pack firewalls 632 and the inter-battery cluster firewalls 631, such that inter-battery pack firewalls 632 are provided between pairs of adjacent battery packs 621, and inter-battery cluster firewalls 631 are provided between pairs of adjacent battery packs 62.

[0140] Specifically, as shown in Figure 16, the housing 611 includes eight steel fixed beams and four square steel support columns. The cluster frame 612 includes multiple support columns, a battery pack mounting rack, and a card slot 6121.

[0141] The cluster frame 612 not only serves the function of mounting the battery pack 621, but it is understood that by providing a card slot 6121, the inter-battery cluster firewall 631 and the inter-battery pack firewall 632 can be detachably attached to the cluster frame 612. This facilitates quick attachment, detachment, and repair by employees.

[0142] On the other hand, the present invention further provides an energy storage container comprising the energy storage container described above and a battery pack 621 or battery cluster 62 located inside the energy storage container.

[0143] As described above, this invention uses micropores on a firewall as a flame suppression means. The micropores in the firewall prevent flames from passing through the firewall due to the cold wall effect and the container wall effect, thus suppressing the spread of flames. At the same time, the multiple micropores on the firewall also function as pressure release holes, allowing large amounts of gas generated by the fire to be discharged through the micropores, preventing the pressure inside the battery box from becoming too high and leading to more serious safety consequences.

[0144] While the basic concepts described above have been explained, it will be clear to those skilled in the art that the disclosures above are merely examples and do not constitute limitations on the present application. Although not explicitly described here, those skilled in the art may make various modifications, improvements, and alterations to the present application. Since such modifications, improvements, and alterations are proposed in the present application, such modifications, improvements, and alterations still fall within the spirit and scope of the embodiments of the present application.

[0145] At the same time, this application uses specific terms to describe embodiments of the application. For example, “one embodiment,” “one embodiment,” and / or “several embodiments” mean a feature, structure, or characteristic relating to at least one embodiment of the application. Therefore, it should be emphasized and noted that “one embodiment,” “one embodiment,” or “one alternative embodiment” mentioned more than once in different places in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be appropriately combined.

[0146] Similarly, in order to simplify the expressions disclosed herein and facilitate the understanding of one or more examples of the application, multiple features may be combined into a single example, drawing, or description thereof in the preceding description of the examples of the application. However, this method of disclosure does not mean that the features required for the subject matter of the application are greater than the features described in the claims. In fact, the features of an example are fewer than all the features of a single example described above.

[0147] In some embodiments, numbers are used to describe the number of components and attributes, but it should be understood that the numbers used in such embodiment descriptions are modified in some examples using the modifiers “about,” “approximate,” or “roughly.” Unless otherwise specifically illustrated, “about,” “approximate,” or “roughly” means that the numbers allow for a ±20% variation. Therefore, in some embodiments, all numerical parameters used in the specification and claims are approximations, and these approximations may vary depending on the desired features of the individual embodiments. In some embodiments, numerical parameters should employ a general digit-reservation method, taking into account the specified number of significant digits. In some embodiments of the present application, numerical ranges and parameters for confirming their breadth are approximations, but in specific embodiments, the setting of such numerical values ​​is as accurate as possible.

[0148] Although this application is described with reference to current specific embodiments, the embodiments described above are solely for illustrative purposes of this application, and it should be recognized by those skilled in the art that various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, both the changes and modifications of the embodiments described above fall within the scope of the claims of this application, within the substantial spirit of this application.

Claims

1. A bottom plate (1) having several cooling channels inside for circulating a cooling medium, and a housing (2) that is commonly surrounded by the bottom plate (1) to form a mounting cavity (6), A busbar (3) is installed at at least one end of the bottom plate (1), located inside or outside the mounting cavity (6), connected to the bottom plate (1), and communicating with the cooling channel, A battery box characterized by having the following features.

2. When the busbar (3) is located outside the mounting cavity (6), the housing (2) comprises a plurality of side plates and at least one mounting plate (21) having a mounting slot (7) formed between it and the bottom plate (1), At least a portion of the busbar (3) is housed inside the mounting slot (7). The battery box according to feature 1.

3. The mounting plate (21) comprises a flat plate segment (211) and a bent plate segment (212) connected in order, one end of the bent plate segment (212) connected to the flat plate segment (211), and the other end of the bent plate segment (212) extending toward the mounting cavity (6) and connected to the bottom plate (1), and the mounting slot (7) is formed between the bent plate segment (212) and the bottom plate (1). The battery box according to feature 2.

4. The plurality of side plates each have a first side plate (22) connected to both ends of the mounting plate (21), and the bus bar (3) extends along a second direction such that its projection on the first side plate (22) along the second direction does not exceed the first side plate (22). The battery box according to feature 2.

5. The busbar (3) is housed inside the mounting slot (7), or A portion of the busbar (3) is housed inside the mounting slot (7) along a first direction, and another portion of the busbar (3) is exposed outside the mounting slot (7). A redundant portion (221) is formed in the portion of the first side plate (22) that extends outside the mounting plate (21) along a first direction, and the projected region of the busbar (3) along a second direction is located within the redundant portion (221). The battery box according to feature 4.

6. When the busbar (3) is located outside the mounting cavity (6), one end of the housing (2) away from the bottom plate (1) has a flange (23) extending toward the outside of the mounting cavity (6), and the projection area of ​​the flange (23) on the bottom plate (1) in a direction perpendicular to the bottom plate (1) includes the projection area of ​​the busbar (3) on the bottom plate (1). The battery box according to feature 1.

7. The side plate comprises a first side plate (22) connected to both ends of the mounting plate (21), and a reinforcing plate (222) is installed at one end of the first side plate (22) closest to the bottom plate (1). The reinforcing plate (222) is installed on the side of the first side plate (21) away from the mounting cavity (6), and the reinforcing plate (222) protrudes toward the side away from the mounting cavity (6), and a sandwich cavity is formed between the reinforcing plate (222) and the first side plate (22). The battery box according to feature 2.

8. The side plate comprises a first side plate (22) connected to both ends of the mounting plate (21), and a reinforcing beam extending in the first direction is installed on the side of the first side plate (22) away from the mounting cavity. The battery box according to feature 2.

9. When the busbar (3) is located outside the mounting cavity (6), The busbar (3) is installed at one end of the bottom plate (1), and the bottom plate (1) further comprises an inlet (11) and an outlet (12) communicating with the cooling channel, and the busbar (3) comprises an inlet channel (34) communicating with the inlet (11) and an outlet channel (33) communicating with the outlet (12), or, The busbars (3) are installed at both ends of the bottom plate (1). The busbar (3) located at one end of the bottom plate (1) is equipped with a liquid inlet (34) and communicates with the liquid inlet (11) of the cooling channel, and the busbar (3) located at the other end of the bottom plate (1) is equipped with a liquid outlet (33) and communicates with the liquid outlet (12) of the cooling channel. A battery box according to any one of claims 1 to 8.

10. A box body (100) comprising: a bottom plate (110) having several parallel cooling channels for circulating a cooling medium inside; and a housing having a fluid inlet structure (200) and a fluid outlet structure (300) that are commonly surrounded by the bottom plate (1) to form the mounting cavity; A busbar (400) is attached to the bottom plate (110), and has a busbar cavity formed inside which a fluid intake channel (410) is formed, with one end communicating with the fluid intake structure (200) and the other end communicating with the fluid intake ports (111) of several parallel cooling channels, and a fluid outlet channel (420) is formed, with one end communicating with the fluid outlet ports (112) of several parallel cooling channels and the other end communicating with the fluid outlet structure (300). The system includes a male end installed on the busbar (400) and a female end installed on the bottom plate (110), the male end and the female end being fitted together, and a flow guide structure that allows the cooling medium to flow uniformly into several parallel cooling channels. The battery box according to feature 1.

11. The busbar (400) is located inside the mounting cavity, and the fluid feeding structure (200) comprises a water inlet nozzle (210) drilled in the housing and a first flow collection block (220) communicating with the water inlet nozzle (210) and the fluid feeding passage (410). The liquid discharge structure (300) comprises a water discharge nozzle (310) drilled in the housing and a second flow collection block (320) communicating with the water discharge nozzle (310) and the liquid discharge channel (420). The bottom wall of the busbar (400) is provided with several fluid inlet ports (411) that all communicate with the fluid inlet channel (410) and several fluid outlet ports (421) that all communicate with the fluid outlet channel (420). The fluid inlet ports (411) and fluid outlet ports (421) correspond one-to-one with the cooling channels, with each of the fluid inlet ports (411) communicating with a fluid inlet (111) of one of the cooling channels, and each of the fluid outlet ports (421) communicating with a corresponding fluid outlet (112) of the cooling channel. The battery box according to feature 10.

12. An upper limit step (510) constituting the male end of the flow guide structure is provided in the circumferential direction of the liquid inflow channel (411) and / or the liquid outflow channel (421). A lower limit step (520) constituting the female end of the flow guide structure is recessed at a position on the bottom plate (110) corresponding to the upper limit step (510), and the upper limit step (510) and the lower limit step (520) are inserted through each other to form a fitting connection surface (5101), and the upper limit step (510) introduces the cooling medium into the cooling channel. The battery box according to feature 11.

13. The bottom plate (110) is provided with partition ribs (113) that divide the cooling channel into several sub-channels (1131). The battery box according to feature 12.

14. The invention comprises a plurality of batteries and a battery box according to any one of claims 1 to 13, wherein the inside of the battery box is adapted to house the plurality of batteries. A battery pack characterized by the following features.

15. It is further equipped with an aerosol fire extinguishing system and a battery management system. The aerosol fire extinguishing device is located above the plurality of batteries or on one side of the plurality of batteries. The aerosol fire extinguishing system further comprises a state feedback device and is arranged to be connected to the battery management system via the state feedback device, and the state feedback device is applied to provide the battery management system with a state quantity indicating whether or not the aerosol fire extinguishing system has been activated. The battery pack according to feature 14.

16. A battery rack (1) is provided which is divided into a plurality of independent units for housing the battery pack according to claim 14 or 15, An energy storage container characterized by the following features.

17. It further includes a chiller, a primary pipeline, a secondary pipeline, and a tertiary pipeline. The primary pipeline is connected to the chiller water inlet and chiller water outlet of the chiller. The secondary conduit is connected to the primary conduit, and the tertiary conduit is connected between the multiple battery packs and the secondary conduit. The primary pipeline is configured to transport coolant from the chiller to the secondary pipeline, or to receive coolant from the secondary pipeline and transport it to the chiller; the secondary pipeline is configured to receive coolant from the primary pipeline and transport it to the tertiary pipeline, or to receive coolant from the tertiary pipeline and transport it to the primary pipeline; The tertiary pipeline is connected to a cooling channel within the battery box of the battery pack and is arranged to receive the coolant from the secondary pipeline and transport it to the cooling channel, or to receive the coolant exported from the cooling channel and transport it to the secondary pipeline. The energy storage container according to feature 16.

18. The fire wall assembly (3) further comprises a fire protection and pressure release unit installed within the battery rack (1), which is arranged intersectingly along the vertical and horizontal directions of the battery rack (1), and which is capable of forming a cold wall effect and a container wall effect. The energy storage container according to feature 16.

19. The fire protection and pressure release unit comprises a plurality of micropores (4), the micropores (4) being through holes provided in the fire protection wall assembly (3), and the projected area of ​​the micropores (4) in any plane perpendicular to the direction of the through holes is 1 mm². ２ The following is: The energy storage container according to feature 18.

20. The firewall assembly (3) is Used to be installed between two adjacent battery clusters (2), each of the battery clusters (2) includes a battery cluster firewall (31) containing multiple battery packs (21), The system includes a battery pack firewall (32) used to be installed between two adjacent battery packs (21), The projected area of ​​the micropores (4) on the inter-battery cluster firewall (31) in any plane perpendicular to the direction of the through-holes of the micropores (4) is smaller than the projected area of ​​the micropores (4) on the inter-battery pack blocking firewall (32) in any plane perpendicular to the direction of the through-holes of the micropores (4). The energy storage container according to feature 19.

21. The battery rack (1) comprises a housing (11), a cluster frame (12) provided inside the housing (11) for mounting the battery pack (21), and a plurality of card slots (121) provided on each of the cluster frames (12), and the firewall assembly (3) engages with the cluster frame (12) via the card slots (121). The energy storage container according to feature 18.

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