A battery pack and a barrel

Abstract

The utility model provides a kind of battery pack and cylinder body.The battery pack includes box and at least one battery module in box;Box includes cover plate and cylinder body;N baffle is fixedly arranged inside cylinder body, and n baffle is arranged along x direction, n≥1;N baffle divides n+1 battery cell placement area in box, and battery module is divided into multiple battery cells by n+1 battery cell placement area, and each battery cell includes at least one single battery.The utility model increases the strength of cylinder body by setting baffle in cylinder body, improves the strength and compression resistance of battery pack box;Secondly, by baffle, one battery module is divided into multiple battery cells, when thermal runaway occurs in single battery in certain battery cell, thermal runaway only acts on single battery in the placement area of the battery cell, and does not affect single battery in the placement area of other battery cells, improves the safety of battery pack after thermal runaway.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically relating to a battery pack and a cylindrical body. Background Technology

[0002] Currently, most battery packs consist of multiple battery modules electrically connected together. Battery pack safety has always been a key concern in this field. Existing battery packs use clamping plates at both ends combined with steel straps to secure multiple individual cells within the battery module before placing them into the pack's outer casing. However, if a single cell experiences thermal runaway, the pack casing may tear under the pressure of the runaway, leading to leakage of thermal runaway fumes and the electrolyte carried within them. This can result in accidents and environmental impacts. Utility Model Content

[0003] The first aspect of this utility model provides a battery pack, which mainly solves the problem of safety hazards existing in the existing battery pack.

[0004] The battery pack includes a housing and at least one battery module located inside the housing;

[0005] The box body includes a cover plate and a cylinder, n≥1;

[0006] The upper end of the cylinder is open, and the cover plate is fixedly installed at the open end of the cylinder;

[0007] Inside the cylinder, n partitions are fixedly installed, and the n partitions are arranged along the x-direction, n≥1; the n partitions divide the inside of the box into n+1 battery unit placement areas. The battery module is divided into multiple battery units by the n+1 battery unit placement areas, and each battery unit includes at least one single battery cell.

[0008] This invention increases the strength of the cylinder by setting a partition inside the cylinder, thereby improving the strength and pressure resistance of the battery pack housing. Secondly, by dividing a battery module into multiple battery units through the partition, when a single cell in a battery unit experiences thermal runaway, the thermal runaway only affects the single cells in the placement area of ​​that battery unit and will not affect the single cells in the placement areas of other battery units. This reduces the coverage area of ​​thermal runaway propagation within the housing and improves the safety of the battery pack after thermal runaway.

[0009] Furthermore, each battery module also includes a hollow tube, which is glued to the top of the battery module and covers the explosion vent of each individual cell within the module. When any individual cell experiences thermal runaway, its explosion vent opens, and the thermal runaway gas is orderly discharged from the hollow tube to the explosion vent manifold. The hollow tube design allows the thermal runaway gas from any individual cell in a battery module to be orderly led out of the enclosure, further preventing the thermal runaway gas from spreading within the enclosure and improving the safety of the battery pack after thermal runaway.

[0010] Furthermore, the explosion-venting manifold of this invention is an N+2 through-tube fixed outside the casing. The N+2 through-tube includes N first tubes and one second tube. One end of each of the N first tubes is connected to one of the N hollow tubes, and the other end of each of the N first tubes is connected to the second tube. By welding the explosion-venting manifold to the casing, in an energy storage system composed of multiple battery packs, each battery pack can orderly discharge thermal runaway to the outside for treatment through its own explosion-venting manifold.

[0011] Furthermore, it also includes heat exchange components; the heat exchange components are connected to the polarity terminals of each individual battery cell. The battery pack of this utility model fixes a heat exchange component on the polarity terminal of each individual battery cell (the polarity terminal mentioned here can be a terminal post, or an integral structure after connecting a terminal post extension to the terminal post). The heat generated by the battery polarity terminal is conducted to the heat exchange tube in close contact with it, and dissipated through heat exchange, thereby achieving the purpose of efficient heat dissipation.

[0012] Furthermore, a slot is provided on the polar terminal of the individual battery, and the heat exchange component includes two heat exchange tubes; one heat exchange tube is snapped into the polar terminal on one side of each individual battery, and the other heat exchange tube is snapped into the polar terminal on the other side of each individual battery, and the outer wall of the two heat exchange tubes is provided with an insulating layer.

[0013] Each heat exchanger tube includes an inlet channel and an outlet channel;

[0014] The inlet channels in two heat exchange tubes are connected in series to form the main inlet path; the outlet channels in multiple heat exchange components are connected in series to form the main outlet path; the end of the main inlet path is connected to the beginning of the main outlet path through an external pipe section.

[0015] After entering the main inlet, the coolant flows through the inlet channels of each heat exchanger in sequence, and then through the outer pipe section, flows through the outlet channels of each heat exchanger in sequence, and flows out from the main outlet.

[0016] In this invention, the coolant forms a highly efficient heat exchange through adjacent inlet and outlet channels inside a single heat exchange tube, ensuring that each polarity terminal receives a balanced heat dissipation effect. For all heat exchange tubes, the temperature difference between the inlet and outlet channels remains essentially constant, effectively avoiding the local overheating or undercooling phenomena present in traditional series cooling (traditional series cooling: the coolant gradually heats up as it flows from the main inlet to the main outlet, resulting in a lower battery temperature near the main inlet and a higher battery temperature at the main outlet).

[0017] In addition, the heat exchange tubes are installed in the slots of the polarity terminals by snap-fit, which facilitates efficient assembly of the battery pack.

[0018] Furthermore, it also includes an electrical connection pressure plate; the electrical connection pressure plate is fixedly connected to the slot opening end of the polarity terminal of the individual battery. The setting of the electrical connection pressure plate not only realizes the electrical connection between individual batteries, but also applies pressure to the heat exchange tube to ensure full contact between the heat exchange tube and the polarity terminal, improving the heat exchange effect of the heat exchange tube, and at the same time, it also realizes the reliable positioning of the heat exchange tube in the polarity terminal slot.

[0019] Furthermore, when there are two or more battery modules, the two or more battery modules are arranged along the y-direction, and an epoxy plate is provided between two adjacent battery modules. The purpose is to provide a safe gap between the polar terminals on the adjacent battery modules, and at the same time to achieve reliable positioning of multiple battery modules in the y-direction.

[0020] Furthermore, the battery pack also includes an insulating sealant layer disposed between the top of the battery module and the cover plate. The thickness of the insulating sealant layer on the top of the battery module must be sufficient to at least cover the heat exchange components. The use of an insulating sealant layer offers the following advantages:

[0021] Firstly, it can avoid the risk of short circuits that may be caused by condensation on heat exchange components;

[0022] Secondly, it can provide clamping force to the hollow tube, preventing the hollow tube from falling off due to insufficient adhesion during thermal runaway.

[0023] Thirdly, it addresses the issue of thermal runaway fumes potentially spreading above the battery cell placement area and affecting other electrical components.

[0024] Furthermore, in order to ensure the overall insulation of the battery pack and reduce the cost of overall insulation treatment of the battery pack, the casing and the explosion venting manifold described in this utility model are coated with an insulating layer.

[0025] The second aspect of this utility model provides a cylindrical body, wherein the upper end of the cylindrical body is open, and n partitions are fixedly arranged inside the cylindrical body, where n≥1; the n partitions divide the cylindrical body into n+1 battery unit placement areas, and each battery unit placement area is used to place at least one single battery cell.

[0026] This invention increases the strength of the cylinder by setting a partition inside the cylinder. By dividing a battery module into multiple battery units, when a single cell in a battery unit experiences thermal runaway, the thermal runaway only affects the single cells in the placement area of ​​that battery unit and will not affect the single cells in the placement areas of other battery units, thus improving the safety of the battery pack after thermal runaway.

[0027] Furthermore, the present invention has an insulating layer sprayed on the inner surface, outer surface and outer surface of the cylinder and the outer surface of the partition, which has a lower manufacturing cost compared with the existing battery pack which uses an epoxy board inside the cylinder for insulation.

[0028] Compared with the prior art, the beneficial effects of this utility model's technical solution are as follows:

[0029] 1. This utility model increases the strength of the cylinder by setting a partition inside the casing, thereby improving the strength and compressive strength of the battery pack casing;

[0030] Secondly, by dividing a battery module into multiple battery cells through a separator, when a single cell in a battery cell experiences thermal runaway, the thermal runaway only affects the single cells within the placement area of ​​that battery cell and will not affect the single cells within the placement areas of other battery cells. This suppresses the spread of thermal runaway within the pack and improves the safety of the battery pack after thermal runaway.

[0031] 2. In this utility model, a hollow tube is attached to the top of each battery module as a venting channel for the battery module. This allows the thermal runaway fumes from any single cell in a battery module to be orderly discharged from the housing, preventing the thermal runaway fumes from spreading inside the housing and improving the safety of the battery pack after thermal runaway.

[0032] Secondly, the hollow tube is pre-positioned on top of the battery module by adhesive bonding, which facilitates assembly and manufacturing.

[0033] 3. The battery pack of this utility model fixes a heat exchange component on the polar terminal of each individual battery cell. The heat generated by the polar terminal of the battery cell is conducted to the heat exchange component that is in close contact with it, and then dissipated through heat exchange, thereby achieving the purpose of efficient heat dissipation.

[0034] Secondly, the heat exchange component in this invention includes two heat exchange tubes. Inside a single heat exchange tube, the coolant forms a high-efficiency heat exchange through adjacent inlet and outlet channels, enabling each polarity terminal to obtain a balanced heat dissipation effect. For all heat exchange tubes, the temperature difference between the inlet and outlet channels remains basically constant, effectively avoiding the local overheating or undercooling phenomenon that exists in traditional series cooling (traditional series cooling: the coolant gradually heats up as it flows from the total inlet to the total outlet, resulting in a lower battery temperature near the total inlet and a higher battery temperature at the total outlet).

[0035] In addition, the heat exchange tubes are installed in the slots of the polarity terminals by snap-fit, which facilitates efficient assembly of the battery pack.

[0036] 4. The electrical connection pressure plate in this utility model can not only realize the electrical connection between each individual battery, but also apply pressure to the heat exchange tube to ensure that the heat exchange tube and the polar terminal are in full contact, thus improving the heat exchange effect of the heat exchange tube. At the same time, it also realizes the reliable positioning of the heat exchange tube in the polar terminal slot.

[0037] 5. In this utility model, the battery pack further includes an insulating sealant layer disposed between the top of the battery module and the cover plate. The thickness of the insulating sealant layer on the top of the battery module must be sufficient to at least cover the heat exchange components. The use of an insulating sealant layer offers the following advantages:

[0038] Firstly, it can avoid the risk of short circuits that may be caused by condensation on heat exchange components;

[0039] Secondly, it can provide clamping force to the hollow tube, preventing the hollow tube from falling off due to insufficient adhesion during thermal runaway.

[0040] Thirdly, it addresses the issue of thermal runaway fumes potentially spreading above the battery cell placement area and affecting other electrical components.

[0041] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is an external view of the battery pack in Embodiment 1;

[0044] Figure 2 This is an external view of the battery pack without the cover plate in Embodiment 1.

[0045] Figure 3 This is a structural diagram of the cylinder in Embodiment 1;

[0046] Figure 4 This is a structural diagram of the explosion venting manifold;

[0047] Figure 5 This is an external view of the battery pack in Embodiment 2;

[0048] Figure 6 This is an external view of the battery pack without the cover plate in Embodiment 2;

[0049] Figure 7 This is a cross-sectional view of the battery pack in Embodiment 2;

[0050] Figure 8 This is an assembly diagram of the electrical connection plate, heat exchange components, and polarity terminals when the individual cells are connected in series in Embodiment 2.

[0051] Figure 9 This is an assembly diagram of the electrical connection plate, heat exchange components, and polarity terminals when the individual cells are connected in parallel in Embodiment 2.

[0052] Figure 10 This is a structural diagram of the cylinder in Embodiment 2.

[0053] Figure label:

[0054] 1-Box body, 11-Cylinder body, 12-Cover plate, 13-Separator, 14-Battery unit placement area, 2-Battery module, 21-Single battery, 211-Terminal post, 212-Terminal post extension, 213-Slot, 22-Hollow tube, 3-N+2 through pipe, 31-First pipe, 32-Second pipe, 4-Heat exchange component, 41-Heat exchange tube, 411-Inlet water channel, 412-Outlet water channel, 5-Electrical connection pressure plate, 6-Insulating sealant layer, 7-Epoxy board. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0056] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0057] In the description of this utility model, it should be noted that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] This invention provides a battery pack. To ensure sufficient strength and pressure resistance of the battery pack housing when a single cell in the battery pack experiences thermal runaway, the battery pack housing of this invention has at least one partition spaced inside the cylindrical body. This partition divides a battery module into multiple battery units. When a single cell in a battery unit experiences thermal runaway, the thermal runaway only affects the cells within the placement area of ​​that battery unit and will not affect the cells within the placement areas of other battery units. This reduces the coverage area of ​​thermal runaway propagation within the housing and improves the safety of the battery pack after thermal runaway.

[0059] It should be noted that:

[0060] 1. The polar terminal described in this utility model can be a single battery terminal post, or it can be an integral structure of a single battery terminal post and a terminal post extension member connected thereto.

[0061] 2. For ease of description, the arrangement direction of the individual cells is defined as the x-direction, the height direction of the individual cells is defined as the z-direction, and the direction perpendicular to both the x-direction and the z-direction is defined as the y-direction.

[0062] Example 1

[0063] like Figures 1 to 4 As shown, this embodiment provides a battery pack, including a housing 1 and battery modules 2; there are N battery modules 2, which are arranged along the y direction in the housing 1, where N≥1; in this embodiment, there are two battery modules 2; each battery module 2 includes n individual batteries 11 arranged along the x direction; the housing 1 includes a cylindrical body 11 and a cover plate 12.

[0064] As shown in the figure, the battery module 2 in this embodiment includes 13 individual batteries 21. In this embodiment, the individual batteries 21 are prismatic batteries, and each individual battery 21 has an electrolyte region and a gas region inside. In other embodiments, the number of individual batteries 21 can be adjusted according to actual needs, and the shape of the individual batteries 21 can also be adjusted according to actual needs.

[0065] like Figure 3 As shown, n partitions are fixedly arranged inside the cylinder 11. In this embodiment, the partitions 13 can be fixed to the cylinder 11 by welding. In some other embodiments, the partitions 13 can also be set inside the cylinder 11 by casting or other integral processing methods, and the n partitions 13 are arranged along the x-direction, n≥1. The n partitions 13 divide the inside of the box 1 into n+1 battery unit placement areas 14. The battery module 2 is divided into multiple battery units by the n+1 battery unit placement areas 14, and each battery unit includes at least one single battery cell 21. In this embodiment, one battery module 2 has 13 single batteries 21, and two partitions are set, that is, three battery unit placement areas. Four single batteries 21 are arranged along the x-direction in the battery unit placement areas 14 at both ends, and five single batteries 21 are placed in the middle battery unit placement area.

[0066] Similar to the battery modules of existing battery packs, in this embodiment, foam boards are provided between adjacent individual cells 21, between the first and last individual cells 21 in each battery unit and the inner wall of the cylinder 11, and between the first and last individual cells 21 in each battery unit and the separator 13.

[0067] To ensure the strength and pressure resistance of the enclosure, the cylinder 11, cover plate 12 and partition plate 13 are all made of metal materials, such as aluminum or steel. In this embodiment, the cylinder, cover plate and partition plate are all made of steel.

[0068] In this embodiment, as Figure 2 As shown, each battery module 2 also includes a hollow tube 22 as a venting channel for the battery module 2. The hollow tube 22 is fixed to the top of the battery module 2 by adhesive and covers the venting part of each individual battery 21 in the battery module 2. When any individual battery experiences thermal runaway, the venting part of the individual battery opens, and the thermal runaway fumes are orderly discharged from the hollow tube to the venting manifold outside the battery pack.

[0069] like Figure 4As shown, in this embodiment, the explosion venting manifold is an N+2 through pipe 3 fixed outside the casing. The N+2 through pipe 3 includes N first pipes 31 and one second pipe 32. One end of each of the N first pipes 31 is connected to one of the N hollow pipes 22, and the other end of each first pipe 31 is connected to the second pipe 32. In this embodiment, since there are two battery modules 2, the explosion venting manifold is a four-way pipe. When multiple battery packs are used to form an energy storage device, the second pipes of the four-way pipes on the multiple battery packs are interconnected.

[0070] Since the casing 1 is made entirely of steel, to ensure the overall insulation of the battery pack, in this embodiment, the inner and outer surfaces of the cover plate 12 and the cylindrical body 11, the surface of the separator 13 in contact with the individual battery cells 21, and the explosion venting manifold are all coated with an insulating layer. This insulating layer can be a powder coating, an enamel layer, etc. Compared with the existing battery pack method of using epoxy boards on the inner walls and bottom plate of the casing for insulation, the insulation treatment method of this embodiment is easier to assemble and reduces the cost of the battery pack. At the same time, since the thickness of the epoxy board is greater than the thickness of the insulating coating, the battery pack structure of this embodiment is more compact and has a higher energy density.

[0071] Example 2

[0072] like Figures 5 to 10 As shown, this embodiment is an optimization based on Embodiment 1. A heat exchange component 4 is added to each battery module 2. This heat exchange component 4 is connected to the polarity terminals of each individual battery cell in the battery module 2, realizing temperature control for each individual battery cell. The polarity terminals are key components connecting the inside and outside of the battery. During charging and discharging, current flows through the polarity terminals into and out of the battery. When heat is generated inside the battery, heat dissipation through the polarity terminals provides a relatively direct heat conduction path. Heat can be quickly conducted from inside the battery to the polarity terminals, and then dissipated from the polarity terminals to the external environment. Furthermore, since the polarity terminals are usually located at the positive and negative terminals of the battery, and during charging and discharging, the vicinity of the positive and negative terminals is often a region where heat is concentrated, heat dissipation through the polarity terminals can more effectively reduce the temperature of these key components.

[0073] In this embodiment, as Figure 6 As shown, the heat exchange component 4 includes two heat exchange tubes 41. One heat exchange tube 41 is connected to the polarity terminal on one side of all the individual cells 21 in the battery module, and the other heat exchange tube 41 is connected to the polarity terminal on the other side of all the individual cells 21 in the battery module.

[0074] like Figure 7As shown, each individual cell 21 has a terminal extension 212 connected to its terminal post 211 as a polarity terminal. The terminal extension 212 has a slot 213 for mounting a heat exchange tube. The slot 213 extends along the x-direction, meaning its length is parallel to the x-axis. The inner shape of the slot 213 is adapted to the cross-sectional shape of the heat exchange tube 41, ensuring a tight clamping of the heat exchange tube to guarantee installation stability and heat transfer between the heat exchange tube and the terminal extension 212. Figure 7 As can be seen from the image, this embodiment uses a rectangular slot 213, and the heat exchange tube 4 that is adapted to it is a square tube.

[0075] In other embodiments, when the height of the terminal post 211 of the single cell 21 meets the requirements, a slot 213 can be directly opened on the terminal post 211 to fix the heat exchange tube.

[0076] In this embodiment, as Figure 7 and 8 As shown, each heat exchange tube 41 includes an inlet channel 411 and an outlet channel 412;

[0077] The inlet channels 411 in the two heat exchange tubes 41 are connected in series to form the total inlet path; the outlet channels 412 in the two heat exchange elements are connected in series to form the total outlet path; the end of the total inlet path is connected to the beginning of the total outlet path through an external pipe section.

[0078] After entering the main inlet, the coolant flows through the inlet channels of each heat exchanger in sequence, and then through the outer pipe section, flows through the outlet channels of each heat exchanger in sequence, and flows out from the main outlet.

[0079] Specifically, since there are two battery modules 2 in this embodiment, the water inlet channels of the four heat exchange tubes 41 of the two battery modules 2 are connected in series, and the water outlet channels of the four heat exchange tubes of the two battery modules are connected in series.

[0080] This series-connected fluid flow design allows cooling water to flow sequentially through each battery module, carrying away the heat generated by each module. During the cooling water flow, each battery module receives relatively even cooling, avoiding temperature differences caused by insufficient or excessive cooling of some battery components, and achieving uniform temperature distribution across the entire battery pack.

[0081] Since the heat exchange medium is water in this embodiment, the outer wall of the heat exchange tube needs to be insulated. The insulation of the outer wall of the heat exchange tube can be achieved by attaching an enamel layer, oxidation treatment, or wearing an insulating sleeve, or a combination of the above methods.

[0082] In this embodiment, an electrical connection pressure plate 5 is also provided. The electrical connection pressure plate 5 is fixedly connected to the opening end of the slot 213 of the polarity terminal of the individual battery. It can not only realize the electrical connection between each individual battery 21, but also apply pressure to the heat exchange tube to ensure that the heat exchange tube 41 is in full contact with the polarity terminal and improve the heat exchange effect of the heat exchange tube. At the same time, it also realizes the reliable positioning of the heat exchange tube 41 in the polarity terminal slot.

[0083] like Figure 7 As shown, when the individual cells in the battery module 2 are connected in series, multiple electrical connection plates 5 are provided, and each pair of adjacent individual cells 21 with different polarity terminals are connected by an electrical connection plate 5.

[0084] like Figure 9 As shown, when the individual cells in the battery module 2 are connected in parallel, two electrical connection plates 5 are provided. The positive terminals of all individual cells 21 in each battery module 2 located on the same side are connected by one electrical connection plate 5; the negative terminals of all individual cells 21 in each battery module 2 located on the same side are connected by another electrical connection plate 5.

[0085] Preferably, the top surface of the electrical connection plate 5 and the end face of the opening section of the polarity terminal slot 213 are flush, and the electrical connection plate can be fixed to the polarity terminal slot by welding.

[0086] like Figure 7 As shown, another optimized design in this embodiment is to inject an insulating sealant layer 6 between the tops of the two battery modules 2 and the cover plate 12. The thickness of the insulating sealant layer 6 on the top of the battery module 2 must be sufficient to at least cover the heat exchange component 4. The use of an insulating sealant layer has the following advantages:

[0087] Firstly, it can avoid the risk of short circuits that may be caused by condensation on heat exchange components;

[0088] Secondly, it can provide clamping force to the hollow tube, preventing the hollow tube from falling off due to insufficient adhesion during thermal runaway.

[0089] Thirdly, it addresses the issue of thermal runaway fumes potentially spreading above the battery cell placement area and affecting other electrical components.

[0090] like Figure 10 As shown, in this embodiment, the polar terminals use rectangular slots, which are relatively large. In order to ensure a safe gap between the polar terminals on adjacent battery modules 2 and to achieve reliable positioning of multiple battery modules 2 in the y direction, an epoxy board 7 is provided between the two battery modules 2 in this embodiment.

Claims

1. A battery pack, characterized in that, Includes a housing and at least one battery module located inside the housing; The enclosure includes a cover plate and a cylindrical body; The upper end of the cylinder is open, and the cover plate is fixedly installed at the open end of the cylinder; Inside the cylinder, n partitions are fixedly installed, and the n partitions are arranged along the x-direction, n≥1; the n partitions divide the inside of the box into n+1 battery unit placement areas. The battery module is divided into multiple battery units by the n+1 battery unit placement areas, and each battery unit includes at least one single battery cell.

2. The battery pack according to claim 1, characterized in that, Each battery module also includes a hollow tube, which is fixed to the top of the battery module by adhesive and covers the explosion vent of each individual cell in the battery module. When any individual cell experiences thermal runaway, the explosion vent of the individual cell opens, and the thermal runaway fumes are discharged in an orderly manner from the hollow tube to the explosion vent manifold outside the battery pack.

3. The battery pack according to claim 2, characterized in that, The explosion relief manifold is an N+2 pipe fixed outside the box. The N+2 pipe includes N first pipes and one second pipe. One end of each of the N first pipes is connected to N hollow pipes, and the other end of each of the N first pipes is connected to the second pipe.

4. The battery pack according to any one of claims 1 to 3, characterized in that, It also includes heat exchange components; the heat exchange components are connected to the polarity terminals of each individual battery cell.

5. The battery pack according to claim 4, characterized in that, A slot is provided on the polar terminal of each individual cell, and the heat exchange component includes two heat exchange tubes; one heat exchange tube is snapped into the polar terminal on one side of each individual cell, and the other heat exchange tube is snapped into the polar terminal on the other side of each individual cell, and the outer wall of the two heat exchange tubes is provided with an insulating layer. Each heat exchanger tube includes an inlet channel and an outlet channel; The inlet channels in two heat exchange tubes are connected in series to form the main inlet path; the outlet channels in multiple heat exchange components are connected in series to form the main outlet path; the end of the main inlet path is connected to the beginning of the main outlet path through an external pipe section. After entering the main inlet, the coolant flows through the inlet channels of each heat exchanger in sequence, and then through the outer pipe section, flows through the outlet channels of each heat exchanger in sequence, and flows out from the main outlet.

6. The battery pack according to claim 5, characterized in that, The battery module consists of two modules, which are arranged along the y-direction and are separated by an epoxy board.

7. The battery pack according to claim 6, characterized in that, It also includes an electrical connection plate; the electrical connection plate is fixedly connected to the slot opening end of the polarity terminal of the individual battery.

8. The battery pack according to claim 7, characterized in that, It also includes an insulating sealant layer, the thickness of which on the top of the battery module must be sufficient to cover the heat exchange components.

9. The battery pack according to claim 8, characterized in that, The enclosure and the explosion vent manifold are both coated with an insulating layer.

10. A cylindrical body, characterized in that, The upper end of the cylinder is open, and n partitions are fixedly installed inside the cylinder, where n≥1; the n partitions divide the cylinder into n+1 battery unit placement areas, and each battery unit placement area is used to place at least one single battery cell.

11. The cylindrical body according to claim 10, characterized in that, The inner surface, outer surface, and outer surface of the cylinder and the partition plate are all coated with an insulating layer.

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