Battery module and energy storage container

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and an energy storage container. The battery module comprises a battery cell assembly and a partition plate, the battery cell assembly comprises a plurality of single battery cells, anti-explosion valves are arranged on the same sides of the single battery cells, the partition plate is connected to the sides, provided with the anti-explosion valves, of the single battery cells, an electrical area is formed on the side, close to the single battery cells, of the partition plate, and a pressure relief area is formed on the side, away from the single battery cells, of the partition plate. The partition divides the electrical region and the pressure relief region. Wherein the partition plate is provided with a pressure discharge area and a non-pressure discharge area, the structural strength of the pressure discharge area is smaller than that of the non-pressure discharge area, the pressure discharge area and the anti-explosion valve are oppositely arranged, and the pressure discharge area is configured to be in an open state after being impacted by the anti-explosion valve so as to communicate the electrical area with the pressure relief area. The energy storage container comprises the battery module. The battery module and the energy storage container provided by the utility model are high in safety performance.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module and an energy storage container. Background Technology

[0002] A battery module consists of multiple individual cells connected in series or parallel. In the design of a battery module, protecting against thermal runaway of individual cells under extreme conditions is a key safety feature. Typically, each individual cell is equipped with an explosion-proof valve. When thermal runaway occurs in an individual cell, the internal pressure rises. This high pressure then ruptures the explosion-proof valve, releasing the high pressure within the cell and preventing it from exploding.

[0003] When the explosion-proof valve ruptures under high pressure, high-temperature, highly corrosive electrolyte and flammable gases will be ejected from the individual battery cells. The high-temperature, highly corrosive electrolyte may splash onto sampling lines, communication lines, and critical electrical components, causing signal interruptions and affecting the timely response of the battery management system and fire suppression system. Flammable gases will reduce the insulation protection capability of the battery module, increase high-voltage arcing, and raise the risk of fire and explosion of the battery module.

[0004] Therefore, a design is needed that completely isolates the thermal runaway pressure relief area from the electrical connection area, thereby reducing the adverse effects of thermal runaway on the safety of the battery module. Utility Model Content

[0005] The main purpose of this utility model is to propose a battery module and energy storage container, which aims to solve the technical problem that the battery module and energy storage container have high safety hazards after the explosion-proof valve is broken by high pressure.

[0006] To achieve the above objectives, this utility model proposes a battery module, comprising:

[0007] A battery cell assembly, comprising multiple individual battery cells, each of which is provided with an explosion-proof valve on the same side;

[0008] A partition is connected to the side of each individual battery cell where the explosion-proof valve is located. The side of the partition closer to the individual battery cell forms an electrical area, and the side of the partition away from the individual battery cell forms a pressure relief area. The partition separates the electrical area and the pressure relief area.

[0009] The partition is provided with a pressure relief zone and a non-pressure relief zone. The structural strength of the pressure relief zone is less than that of the non-pressure relief zone. The pressure relief zone is disposed opposite to the explosion-proof valve. The pressure relief zone is configured to be in an open state after being impacted by the explosion-proof valve, so as to connect the electrical area and the pressure relief zone.

[0010] In some embodiments, the battery module includes a bracket disposed between the individual battery cell and the separator. The bracket has a pressure relief channel with a first pressure relief port and a second pressure relief port that are disposed opposite to each other and communicate with each other. The first pressure relief port corresponds to the explosion-proof valve, and the second pressure relief port is attached to the pressure relief area.

[0011] In some embodiments, along the direction from the individual battery cell to the separator, the projection of the first pressure outlet onto the separator covers the projection of the explosion-proof valve onto the separator.

[0012] In some embodiments, along the direction from the individual cell to the separator, the distance L between the first pressure outlet and the second pressure outlet satisfies: L≥7mm.

[0013] In some embodiments, the thickness of the pressure relief zone is less than the thickness of the non-pressure relief zone.

[0014] In some embodiments, a groove is formed on the side of the pressure relief area away from the individual battery cell, so that the thickness of the pressure relief area is less than the thickness of the non-pressure relief area.

[0015] In some embodiments, the battery module includes a housing having a base and a cover, with a receiving cavity formed between the base and the cover, and the cell assembly and the separator disposed within the receiving cavity;

[0016] The base has a first extension along its circumference, moving away from the receiving cavity. The cover has a second extension along its circumference, moving away from the receiving cavity. The first extension has a first connecting hole, and the second extension has a second connecting hole. A first connector passes through the first and second connecting holes to connect the cover to the base.

[0017] In some embodiments, a sealing ring is provided between the first extension and the second extension.

[0018] In some embodiments, the first extension is provided with a first adhesive surface, and the partition is provided with a second adhesive surface, wherein the second adhesive surface and the first adhesive surface are bonded together so that the partition is bonded to the first extension;

[0019] Alternatively, the first extension is provided with a first snap-fit ​​portion, and the partition is provided with a second snap-fit ​​portion, the second snap-fit ​​portion cooperating with the first snap-fit ​​portion so that the partition is snapped into the first extension;

[0020] Alternatively, the first extension is provided with a third connecting hole, the partition is provided with a fourth connecting hole, and a second connector is inserted through the third connecting hole and the fourth connecting hole to connect the partition to the first extension.

[0021] In some embodiments, the cover is provided with a pressure relief valve, the pressure relief valve is connected to the pressure relief area, and the pressure relief valve has a sealed state and an open state;

[0022] When the air pressure in the pressure relief area exceeds a preset air pressure threshold, the pressure relief valve changes from the sealed state to the open state.

[0023] Correspondingly, this utility model also proposes an energy storage container, comprising:

[0024] Box;

[0025] The battery module described in any of the above embodiments is disposed within the housing;

[0026] A heat dissipation system is installed in the housing to maintain the temperature of the battery module during operation.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] In the technical solution of this utility model, a separator divides the inside of the battery module into a relatively sealed pressure relief area and an electrical area. The battery cell assembly is located in the electrical area, and the explosion-proof valve on each individual battery cell is close to the separator. Compared to the explosion-proof valve, the separator has a pressure relief area with weaker structural strength. When a single battery cell experiences thermal runaway, the high pressure generated inside the cell will rupture the explosion-proof valve, generating a momentary high-pressure impact at the valve. This impact force can destroy the pressure relief area, causing it to open, thus forming a through hole in the pressure relief area. Simultaneously, with the instantaneous high-pressure impact generated at the explosion-proof valve, some of the contents within the individual battery cell (e.g., the contents may include electrolyte, flammable gas, etc.) will be ejected. Driven by the impact force, the ejected contents will enter through the through-holes generated in the pressure relief area and be collected in the pressure relief area, ensuring that the ejected contents do not remain in the electrical area. This prevents the ejected contents from intertwining with the electrical components in the electrical area, thus preventing the ejected contents from damaging the electrical components and ensuring the safety of the battery module in use.

[0029] In this invention, the electrical area is used to install electrical components such as battery cell assemblies, and the pressure relief area is used to collect the contents ejected from the explosion-proof valve. With this structure, the ejected contents are collected in an independent space and do not come into direct contact with the electrical components, thus ensuring the structural safety of the electrical components and preventing high-voltage arcing.

[0030] The use of the above-mentioned battery modules in energy storage containers helps to ensure safety and reduce the risk of high-voltage arcing, fire and explosion. Attached Figure Description

[0031] 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 the structures shown in these drawings without creative effort.

[0032] Figure 1 This is an exploded view of the overall structure of a battery module provided in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 This is a cross-sectional view of the overall structure of a battery module provided in an embodiment of the present invention;

[0035] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0036] Figure 5 This is a schematic diagram of the structure of the bracket in the battery module provided in an embodiment of the present invention from a first perspective;

[0037] Figure 6 This is a schematic diagram of the structure of the bracket in the battery module provided in an embodiment of the present invention from a second perspective;

[0038] Figure 7 This is a schematic diagram of the structure of the separator in a battery module according to an embodiment of the present invention;

[0039] Figure 8 This is a partial enlarged view of the separator in the pressure relief area of ​​a battery module according to an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the structure of a single battery cell in a battery module provided in an embodiment of the present invention.

[0041] Explanation of icon numbers:

[0042] 10. Battery module;

[0043] 100. Battery cell assembly;

[0044] 110. Single battery cell;

[0045] 111. Explosion-proof valve;

[0046] 200. Partition;

[0047] 210. Pressure relief zone; 220. Non-pressure relief zone;

[0048] 211. Groove;

[0049] 300. Electrical Area;

[0050] 400. Pressure relief area;

[0051] 500, bracket;

[0052] 510. Pressure relief channel; 520. First pressure relief port; 530. Second pressure relief port;

[0053] 600. Casing;

[0054] 610. Base; 620. Cover; 630. Receiving cavity;

[0055] 611. First extension;

[0056] 621. Second extension;

[0057] 6111, First connecting hole;

[0058] 6211, Second connecting hole;

[0059] 700. First connector;

[0060] 800, sealing ring;

[0061] 900. Pressure relief valve.

[0062] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0063] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0064] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0065] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0066] A battery module consists of multiple individual cells connected in series or parallel. In the design of a battery module, protecting against thermal runaway of individual cells under extreme conditions is a key safety feature. Typically, each individual cell is equipped with an explosion-proof valve. When thermal runaway occurs in an individual cell, the internal pressure rises. This high pressure then ruptures the explosion-proof valve, releasing the high pressure within the cell and preventing it from exploding.

[0067] When the explosion-proof valve ruptures under high pressure, high-temperature, highly corrosive electrolyte and flammable gases will be ejected from the individual battery cells. The high-temperature, highly corrosive electrolyte may splash onto sampling lines, communication lines, and critical electrical components, causing signal interruptions and affecting the timely response of the battery management system and fire suppression system. Flammable gases will reduce the insulation protection capability of the battery module, increase high-voltage arcing, and raise the risk of fire and explosion of the battery module.

[0068] Therefore, a design is needed that completely isolates the thermal runaway pressure relief area from the electrical connection area, thereby reducing the adverse effects of thermal runaway on the safety of the battery module.

[0069] Based on this, in order to solve the technical problem that the battery module 10 poses a high safety hazard after the explosion-proof valve 111 is ruptured by high pressure, referring to Figures 1 to 9 One embodiment of the present invention provides a battery module 10, which includes a cell assembly 100 and a separator 200.

[0070] The battery cell assembly 100 includes multiple individual battery cells 110, which are connected in series or in parallel. Each individual battery cell 110 is equipped with an explosion-proof valve 111 on the same side. The function of the explosion-proof valve 111 is to automatically open the valve when the internal pressure of the individual battery cell 110 increases, release the high-pressure gas inside the individual battery cell 110, prevent the individual battery cell 110 from exploding, and ensure the safety performance of the individual battery cell 110.

[0071] A partition 200 is connected to the side of each individual battery cell 110 where an explosion-proof valve 111 is located. The side of the partition 200 closest to the individual battery cell 110 forms an electrical area 300, and the side of the partition 200 furthest from the individual battery cell 110 forms a pressure relief area 400. The partition 200 separates the electrical area 300 and the pressure relief area 400, preventing them from communicating. The partition 200 includes a pressure relief area 210 and a non-pressure relief area 220. The structural strength of the pressure relief area 210 is less than that of the non-pressure relief area 220. The pressure relief area 210 is positioned opposite the explosion-proof valve 111 and is configured to open upon impact from the explosion-proof valve 111, thus connecting the electrical area 300 and the pressure relief area 400. When the battery module 10 is in normal condition, the separator 200 is a complete plate structure. At this time, there are no gaps or holes in the separator 200 corresponding to the explosion-proof valve 111. The separator 200 serves to prevent water and dust, which helps improve the sealing of the electrical area 300. When a single cell 110 in the battery module 10 experiences thermal runaway, only the pressure relief area 210 on the separator 200 corresponding to the abnormal single cell 110 will open under pressure, while the rest of the separator 200 remains closed, thus improving the structural strength of the separator 200. The separator 200 is preferably made of high-temperature resistant materials; for example, ceramics or mica can be used.

[0072] Specifically, in this embodiment, a relatively sealed pressure relief area 400 and an electrical area 300 are separated inside the battery module 10 by a partition 200. The cell assembly 100 is located in the electrical area 300, and the explosion-proof valve 111 on the individual cell 110 in the cell assembly 100 is close to the partition 200. Compared with the explosion-proof valve 111, the partition 200 has a pressure relief area 210 with weaker structural strength. When a single cell 110 experiences thermal runaway, the high pressure generated inside the single cell 110 will break the explosion-proof valve 111 and generate a momentary high-pressure impact at the explosion-proof valve 111. This impact force can destroy the pressure relief area 210, causing the pressure relief area 210 to be in an open state, that is, forming a through hole at the pressure relief area 210. Simultaneously, with the impact of the instantaneous high pressure generated at the explosion-proof valve 111, some of the contents inside the single cell 110 (for example, the contents may include electrolyte, flammable gas, etc.) will be ejected. Under the influence of the impact force, the ejected contents will enter through the through hole generated at the pressure relief area 210 and be collected in the pressure relief area 400, ensuring that the ejected contents will not remain in the electrical area 300. This prevents the ejected contents from intertwining with the electrical components in the electrical area 300, thus preventing the ejected contents from damaging the electrical components and ensuring the safety of the battery module 10 in use.

[0073] In this embodiment, the electrical area 300 is used to install electrical components such as the battery cell assembly 100, and the pressure relief area 400 is used to collect the contents ejected from the explosion-proof valve 111. With this structure, the ejected contents are collected in an independent space and do not come into direct contact with the electrical components, thus ensuring the structural safety of the electrical components and preventing high-voltage arcing.

[0074] In some embodiments, refer to Figures 1 to 6 The battery module 10 includes a bracket 500, which is disposed between the individual battery cell 110 and the separator 200. The bracket 500 has a pressure relief channel 510, which has a first pressure relief port 520 and a second pressure relief port 530 that are arranged opposite to each other and communicate with each other. The first pressure relief port 520 corresponds to the explosion-proof valve 111, and the second pressure relief port 530 is attached to the pressure relief area 210.

[0075] Specifically, in this embodiment, when a single battery cell 110 experiences thermal runaway and impacts the explosion-proof valve 111, the impact force is transmitted from the explosion-proof valve 111 to the first pressure relief port 520, then from the first pressure relief port 520 to the second pressure relief port 530, and finally from the second pressure relief port 530 to the pressure relief zone 210, ultimately causing the pressure relief zone 210 to be impacted and form a through hole. Simultaneously, with the impact at the explosion-proof valve 111, some of the contents of the single battery cell 110 are ejected into the pressure relief zone 400 through the pressure relief channel 510 and the through hole formed in the pressure relief zone 210, allowing the contents to be collected in the pressure relief zone 400.

[0076] During the injection of the contents, the pressure relief channel 510 can guide the contents, allowing them to concentrate within the channel and preventing them from spraying outwards. This ensures that all contents are injected and collected within the pressure relief area 400, preventing damage to electrical components in the electrical area 300 and guaranteeing the structural stability and operational safety of these components.

[0077] In some embodiments, refer to Figure 4 Along the direction from the individual cell 110 to the separator 200, the projection of the first pressure port 520 on the separator 200 covers the projection of the explosion-proof valve 111 on the separator 200.

[0078] Specifically, in this embodiment, the size of the first pressure relief port 520 is larger than the size of the explosion-proof valve 111, so that the explosion-proof valve 111 can be enclosed within the first pressure relief port 520. With this structure, the contents of the single-cell battery 110 ejected from the explosion-proof valve 111 can all enter the pressure relief channel 510 through the first pressure relief port 520, preventing leakage of the ejected contents at the first pressure relief port 520 and thus affecting the structural stability of the electrical components within the electrical area 300.

[0079] In some embodiments, refer to Figures 4 to 6 Along the direction from the individual cell 110 to the separator 200, the distance L between the first pressure port 520 and the second pressure port 530 satisfies: L≥7mm. For example, the value of L can be 7mm, 8mm, 8.5mm, 9mm, 10mm, etc.

[0080] Specifically, in this embodiment, when the explosion-proof valve 111 is forced open under pressure, it will cause certain structural damage. For example, part of the structure of the explosion-proof valve 111 may be turned outwards. The outward-turned structure requires a certain space. Therefore, there is a certain distance between the first pressure relief port 520 and the second pressure relief port 530, that is, a certain space is reserved in the pressure relief channel 510. This can prevent the opening of the explosion-proof valve 111 from being obstructed due to the small space in the pressure relief channel 510, thereby ensuring that the individual battery cell 110 can be depressurized normally and avoiding the explosion of the individual battery cell 110. In addition, the reserved space in the pressure relief channel 510 can ensure that the contents ejected from the individual battery cell 110 will not be blocked in the pressure relief channel 510, so that the ejected contents can pass smoothly through the pressure relief channel 510 and be sprayed into the pressure relief area 400, realizing the collection of the ejected contents in the pressure relief area 400 and preventing the ejected contents from affecting the structural safety of the electrical components in the electrical area 300.

[0081] In some embodiments, refer to Figure 4 Along the direction from the individual battery cell 110 to the separator 200, the projections of the first pressure outlet 520 onto the separator 200 and the second pressure outlet 530 onto the separator 200 can coincide, meaning the first pressure outlet 520 and the second pressure outlet 530 have the same size, making the pressure outlet channel 510 a straight section. This structure ensures sufficient space within the pressure outlet channel 510, preventing the contents ejected from the individual battery cell 110 from clogging the pressure outlet channel 510.

[0082] Alternatively, in other embodiments, refer to Figure 4 Along the direction from the individual cell 110 to the separator 200, the projection of the first pressure outlet 520 onto the separator 200 can cover the projection of the second pressure outlet 530 onto the separator 200. That is, the size of the first pressure outlet 520 is larger than the size of the second pressure outlet 530, making the pressure relief channel 510 have a tapered structure. With the above structure, it can be ensured that the contents ejected from the individual cell 110 are more concentrated and sprayed into the pressure relief area 400, preventing the contents sprayed into the pressure relief area 400 from splashing.

[0083] In some embodiments, refer to Figure 8 The thickness of the pressure relief zone 210 is less than the thickness of the non-pressure relief zone 220.

[0084] Specifically, in this embodiment, the thinner pressure relief zone 210 has lower structural strength, while the thicker non-pressure relief zone 220 has higher structural strength. The impact generated at the explosion-proof valve 111 can easily damage the pressure relief zone 210, making it easy for the pressure relief zone 210 to open after being impacted. This ensures that the contents of the individual battery cell 110 ejected from the explosion-proof valve 111 can smoothly pass through the pressure relief zone 210 and be ejected into the pressure relief zone 400, achieving collection of the ejected contents within the pressure relief zone 400. At the same time, the impact generated at the explosion-proof valve 111 does not affect the structural stability of the non-pressure relief zone 220, thereby ensuring the overall structural strength of the partition 200.

[0085] In some embodiments, a structural form is provided to achieve "the thickness of the pressure relief region 210 is less than the thickness of the non-pressure relief region 220", for example, referring to Figure 8 A groove 211 is provided on the side of the pressure relief area 210 away from the single cell 110 so that the thickness of the pressure relief area 210 is less than the thickness of the non-pressure relief area 220. By creating a groove, the thickness of the pressure relief area 210 can be reduced, thereby reducing the structural strength of the pressure relief area 210 and making it easier for the pressure relief area 210 to be broken open by impact force.

[0086] Alternatively, in some other embodiments, another structural form is provided to achieve "the pressure relief zone 210 is easily broken open by impact force". For example, along the circumference of the pressure relief zone 210, the partition 200 is provided with a connection hole, which is used to reduce the connection strength between the pressure relief zone 210 and the non-pressure relief zone 220.

[0087] In some embodiments, refer to Figure 1 and Figure 3The battery module 10 includes a housing 600, which has a base 610 and a cover 620. A receiving cavity 630 is formed between the base 610 and the cover 620, and the cell assembly 100 and the separator 200 are disposed within the receiving cavity 630. Along the circumference of the base 610, a first extension 611 is provided in the direction away from the receiving cavity 630. Along the circumference of the cover 620, a second extension 621 is provided in the direction away from the receiving cavity 630. The first extension 611 has a first connecting hole 6111, and the second extension 621 has a second connecting hole 6211. A first connector 700 passes through the first connecting hole 6111 and the second connecting hole 6211 to connect the cover 620 to the base 610. For example, the first connecting hole 6111 and the second connecting hole 6211 can both be through holes. In this case, the first connecting member 700 can be a bolt, with one end of the bolt passing through the first connecting hole 6111 and the second connecting hole 6211 respectively, and a nut connected to the passing end of the bolt. Alternatively, the first connecting hole 6111 and the second connecting hole 6211 can both be provided with internal threads. In this case, the first connecting member 700 can be a bolt, with one end of the bolt passing through the first connecting hole 6111 and the second connecting hole 6211 respectively, and screwed into the first connecting hole 6111 and the second connecting hole 6211.

[0088] Specifically, in this embodiment, the cover 620 and the base 610 are detachably connected via the first connector 700, which facilitates both the installation of the cover 620 and the base 610 and the maintenance of the battery module 10. When a malfunction occurs in the cell assembly 100 within the receiving cavity 630, the cover 620 can be disassembled to allow for timely repair or replacement of the cell assembly 100, ensuring the safe use of the battery module 10. Furthermore, the provision of the first extension 611 and the second extension 621 increases the connection area between the cover 620 and the base 610, thereby improving the connection stability between them.

[0089] In some embodiments, refer to Figure 1 A sealing ring 800 is provided between the first extension 611 and the second extension 621. The sealing ring 800 may be provided with a fifth connecting hole, and the first connecting member 700 may pass through the first connecting hole 6111, the fifth connecting hole and the second connecting hole 6211 in sequence to achieve a stable connection between the sealing ring 800 and the first extension 611 and the second extension 621.

[0090] Specifically, in this embodiment, the sealing ring 800 helps to reduce the gap between the first extension 611 and the second extension 621, thereby improving the sealing performance of the receiving cavity 630, enhancing the dustproof and waterproof performance of the receiving cavity 630, and ensuring the safety of the battery module 10 in use.

[0091] In some embodiments, the first extension 611 is provided with a first adhesive surface, the partition 200 is provided with a second adhesive surface, the second adhesive surface and the first adhesive surface are coated with adhesive, and the second adhesive surface and the first adhesive surface are bonded together so that the partition 200 is bonded to the first extension 611.

[0092] Specifically, in this embodiment, the partition 200 can be glued to the base 610. The partition 200 and the base 610 are glued together, which helps to reduce the installation difficulty of the partition 200 and the base 610, improve the connection stability of the partition 200 and the base 610, and achieve a non-destructive connection between the partition 200 and the base 610.

[0093] Alternatively, in some other embodiments, the first extension 611 is provided with a first snap-fit ​​portion, and the partition 200 is provided with a second snap-fit ​​portion, the second snap-fit ​​portion and the first snap-fit ​​portion cooperating to make the partition 200 snap-fit ​​onto the first extension 611.

[0094] Specifically, in this embodiment, the first snap-fit ​​part can be a snap-fit ​​block, and the second snap-fit ​​part can be a snap-fit ​​groove. Alternatively, the first snap-fit ​​part can be a snap-fit ​​groove, and the second snap-fit ​​part can be a snap-fit ​​block. The partition 200 can be snapped onto the base 610. The snap-fit ​​method between the partition 200 and the base 610 helps to improve the installation accuracy of the partition 200 and the base 610, and improves the installation efficiency of the partition 200 and the base 610.

[0095] Alternatively, in some other embodiments, the first extension 611 is provided with a third connecting hole, the partition 200 is provided with a fourth connecting hole, and a second connector is inserted through the third connecting hole and the fourth connecting hole to connect the partition 200 to the first extension 611.

[0096] Specifically, in this embodiment, both the third and fourth connecting holes can be through holes. In this case, the second connecting member can be a bolt, with one end of the bolt passing through both the third and fourth connecting holes, and a nut connected to the passing end of the bolt. Alternatively, both the third and fourth connecting holes can be provided with internal threads. In this case, the second connecting member can be a bolt, with one end of the bolt passing through both the third and fourth connecting holes and screwed into them. The partition 200 can be threadedly connected to the base 610. The threaded connection between the partition 200 and the base 610 helps to improve the vibration resistance of the partition 200 and ensures that the partition 200 is not easily displaced.

[0097] Alternatively, in some other embodiments, the first extension 611 is provided with a first magnetic attraction part, and the partition 200 is provided with a second magnetic attraction part. The second magnetic attraction part and the first magnetic attraction part attract each other to magnetically connect the partition 200 to the first extension 611.

[0098] In some embodiments, refer to Figure 1 The cover 620 is equipped with a pressure relief valve 900, which is connected to the pressure relief zone 400. The pressure relief valve 900 has a sealed state and an open state. When the air pressure in the pressure relief zone 400 exceeds a preset air pressure threshold, the pressure relief valve 900 changes from the sealed state to the open state. The cover 620 can have one pressure relief valve 900, or it can have multiple pressure relief valves 900 spaced apart. Multiple pressure relief valves 900 are more conducive to improving the pressure relief efficiency within the pressure relief zone 400.

[0099] Specifically, in this embodiment, under normal operating conditions of the battery module 10, the pressure relief area 400 and the external air pressure are in a state of pressure balance. At this time, the pressure relief valve 900 is in a sealed state to ensure the sealing of the receiving cavity 630 and improve the waterproof and dustproof performance of the receiving cavity 630. When some individual cells 110 in the battery module 10 malfunction (for example, some individual cells 110 experience thermal runaway), the explosion-proof valve 111 of the individual cell 110 will eject its contents outward. The contents include flammable gas, which will eventually flow into the pressure relief area 400, causing the air pressure in the pressure relief area 400 to increase. When the air pressure in the pressure relief zone 400 reaches the preset air pressure threshold, for example, the preset air pressure threshold can be set to 5 kPa, the pressure relief valve 900 is in the open state, so that the pressure relief zone 400 is connected to the external air pressure, thereby reducing the air pressure in the pressure relief zone 400, and ultimately ensuring that the pressure relief zone 400 and the external air pressure are in a pressure balance state, eliminating potential safety hazards caused by the pressure imbalance between the pressure relief zone 400 and the external air pressure.

[0100] It should be noted that the pressure relief valve 900 is a common structural component in this field. Therefore, the specific structure and operation of the pressure relief valve 900 can be found in the prior art, and will not be described in detail here.

[0101] Correspondingly, another embodiment of this utility model also provides an energy storage container, which includes a container body, a battery module 10 as described in any of the above embodiments, a heat dissipation system, and a communication module. The battery module 10 is disposed inside the container body, which provides effective protection for the battery module 10. The heat dissipation system is disposed in the container body to maintain the temperature of the battery module 10 during operation, and the heat dissipation system can be a cooling fan, etc. The communication module is electrically connected to the battery module 10 and is used to monitor the operating status of the battery module 10 in real time. When an abnormality occurs in the battery module 10, the communication module can promptly transmit the abnormal signal to the controller, and the controller can trigger an alarm.

[0102] Specifically, in this embodiment, the use of the above-mentioned battery module 10 in the energy storage container helps to ensure safety and reduce the risk of high-voltage arcing, fire and explosion of the energy storage container.

[0103] Thanks to the improvements to the battery module 10 described above, the energy storage container of this embodiment has the same technical effects as the battery module 10 described above, which will not be repeated here.

[0104] It should be noted that other contents of the battery module 10 and energy storage container disclosed in this utility model can be found in the prior art, and will not be repeated here.

[0105] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A battery module, characterized by, The battery module comprises a cell assembly and a partition plate. The cell assembly comprises a plurality of single cells, and each single cell is provided with an explosion-proof valve on the same side. The partition plate is connected to the side of each single cell provided with the explosion-proof valve. The partition plate is provided with a pressure relief area and a non-pressure relief area.

2. The battery module of claim 1, wherein, The structural strength of the pressure relief area is less than that of the non-pressure relief area.

3. The battery module of claim 2, wherein, The pressure relief area is arranged opposite to the explosion-proof valve.

4. The battery module of claim 2, wherein, After being impacted by the explosion-proof valve, the pressure relief area is in an open state to connect the electrical area and the pressure relief area.

5. The battery module of claim 1, wherein, The battery module comprises a support arranged between the single cell and the partition plate.

6. The battery module of claim 5, wherein, The support has a pressure relief channel with a first pressure relief port and a second pressure relief port arranged opposite to each other and connected to each other.

7. The battery module of claim 1, wherein, The first pressure relief port corresponds to the explosion-proof valve, and the second pressure relief port is attached to the pressure relief area. In the direction from the single cell to the partition plate, the projection of the first pressure relief port on the partition plate covers the projection of the explosion-proof valve on the partition plate.

8. The battery module of claim 7, wherein, In the direction from the single cell to the partition plate, the distance L between the first pressure relief port and the second pressure relief port satisfies L≥7mm.

9. The battery module of claim 7, wherein, The thickness of the pressure relief area is less than that of the non-pressure relief area. The pressure relief area is provided with a groove on the side away from the single cell, so that the thickness of the pressure relief area is less than that of the non-pressure relief area. The battery module comprises a housing with a base and a cover.

10. The battery module of claim 7, wherein, The base and the cover form a receiving cavity. The cell assembly and the partition plate are arranged in the receiving cavity. The base is provided with a first extension part away from the receiving cavity along the circumference of the base. The cover is provided with a second extension part away from the receiving cavity along the circumference of the cover. The first extension part is provided with a first connecting hole, and the second extension part is provided with a second connecting hole. A first connecting member is arranged in the first connecting hole and the second connecting hole to connect the cover to the base. The first extension part and the second extension part are provided with a sealing ring. The first extension part is provided with a first bonding surface, and the partition plate is provided with a second bonding surface. The second bonding surface and the first bonding surface are bonded to bond the partition plate to the first extension part. Alternatively, the first extension part is provided with a first clamping part, and the partition plate is provided with a second clamping part. The second clamping part and the first clamping part are matched to clamp the partition plate to the first extension part. Alternatively, the first extension part is provided with a third connecting hole, and the partition plate is provided with a fourth connecting hole. A second connecting member is arranged in the third connecting hole and the fourth connecting hole to connect the partition plate to the first extension part. The cover is provided with a pressure relief valve. The pressure relief valve is in communication with the pressure relief area. The pressure relief valve has a sealing state and an open state. Wherein, when the air pressure in the pressure relief area exceeds a preset air pressure threshold, the pressure relief valve is switched from the sealed state to the open state.

11. An energy storage container, characterized by Comprise: a box; the battery module of any one of claims 1 to 10, which is arranged in the box; a heat dissipation system, which is arranged in the box and used to maintain the temperature of the battery module when the battery module is working.

Images