Battery mounting plate, battery pack and electrical equipment

Abstract

This application relates to the field of battery assembly and manufacturing technology, and more particularly to a battery mounting plate, a battery pack, and an electrical device. The battery mounting plate includes a plate body with a contoured groove and a drain groove. The contoured groove is semi-enclosed to accommodate the battery, and the drain groove communicates with the contoured groove to correspond with the battery's explosion-proof valve. By providing a contoured groove on the battery mounting plate to accommodate the battery, and by providing a drain groove connected to the battery's explosion-proof valve, when an abnormal situation occurs such as a sudden increase in internal pressure exceeding a safety threshold, the battery's explosion-proof valve can open normally, releasing high-pressure, high-heat gas through the drain groove, and then through a pressure relief valve on the battery pack to the outside of the casing, thus improving the safety and reliability of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery assembly and manufacturing technology, and in particular to a battery fixing plate, a battery pack, and an electrical device. Background Technology

[0002] Currently, during battery pack assembly and manufacturing, multiple batteries are typically connected, placed into a casing, and then potting compound is applied to the casing to secure the batteries. Finally, components such as the top cover and pressure relief valve are assembled to form the battery pack. The use of potting compound is necessary to ensure that the batteries are fully secured to the casing; otherwise, in the event of vibration or drop, the connecting tabs or welded joints between the batteries in the battery pack are prone to breakage.

[0003] However, the explosion-proof valve on the battery is easily blocked by potting compound. When abnormal situations such as a sudden increase in internal pressure exceeding the safety threshold occur, the explosion-proof valve cannot open, posing a safety hazard of battery pack explosion. Summary of the Invention

[0004] Based on this, this application provides a battery fixing plate, a battery pack, and an electrical device to solve the safety problem of the explosion-proof valve being blocked by potting compound, which prevents the explosion-proof valve from opening and poses a risk of battery pack explosion.

[0005] On one hand, this application provides a battery fixing plate, including a plate body, on which a contour groove and a drain groove are provided. The contour groove is semi-enclosed to accommodate the battery, and the drain groove is used to communicate with the contour groove so as to communicate with the explosion-proof valve of the battery.

[0006] In one possible implementation, the contoured groove has a connecting port adapted to face the battery's explosion-proof valve to discharge battery waste.

[0007] In one possible implementation, the discharge trough is located on the side wall of the contour trough, with one end extending toward the bottom of the contour trough and the other end extending outward from the contour trough.

[0008] In one possible implementation, the adjacent sidewalls of the two contoured grooves are connected, and the drain trough is located on the sidewall and is connected to the two contoured grooves on both sides respectively. One end of the drain trough extends to the bottom of the contoured groove, and the other end extends outward from the contoured groove.

[0009] In one possible implementation, the drain channel is a hollow columnar structure located on the plate.

[0010] In one possible implementation, there are multiple contouring grooves, with the drain groove located between adjacent contouring grooves and connected to at least two contouring grooves respectively.

[0011] In one possible implementation, the drain trough corresponds one-to-one with the contour trough and is connected to the corresponding contour trough.

[0012] In one possible implementation, the length of the drain groove is L1 along the opening direction of the contoured groove, and the height of the battery is L2. L1 and L2 satisfy: 1 / 2L2<L1≤L2.

[0013] In one possible implementation, the drain trough cooperates with the battery contained in the contoured groove to form a drain channel extending outward from the side wall of the contoured groove. Along the communication direction of the drain channel, the cross-sectional area of ​​the drain channel ranges from 10 square millimeters to 100 square millimeters.

[0014] In one possible implementation, the contoured groove includes a fixed groove and an explosion-proof groove, which are interconnected. The fixed groove is used to accommodate the battery, and the battery end face completely covers the explosion-proof groove. The opening of the explosion-proof groove is adapted to face the explosion-proof valve of the battery.

[0015] In one possible implementation, the explosion-proof groove and the fixing groove are arranged along the depth direction of the contour groove, with the explosion-proof groove located away from the battery in the fixing groove.

[0016] In one possible implementation, there is a gap between the bottom wall of the contoured groove and the battery housed in the contoured groove.

[0017] In one possible implementation, the width of the spacing ranges from 3mm to 5mm.

[0018] In one possible implementation, there is a gap between the sidewall of the contoured groove and the battery housed in the contoured groove.

[0019] In one possible implementation, the gap width ranges from 0.1mm to 0.2mm.

[0020] On the other hand, this application provides a battery pack, including:

[0021] The housing has a receiving cavity inside;

[0022] A battery fixing plate is disposed in the receiving cavity, and the battery fixing plate is the aforementioned battery fixing plate;

[0023] The battery is placed in a contoured groove, and the battery's explosion-proof valve is located in the contoured groove.

[0024] In one possible implementation, the battery pack also includes expanding foam disposed in the receiving cavity, the height of which is greater than the top surface of the battery fixing plate and less than the height of the top of the drain groove.

[0025] In one possible implementation, the battery pack also includes a top cover disposed on the housing, the top cover being used to seal the receiving cavity, and the top cover having a pressure relief valve.

[0026] In another aspect, this application provides an electrical device including the aforementioned battery pack.

[0027] The battery mounting plate, battery pack, and electrical equipment provided in this application improve the safety and reliability of the battery pack by setting a contoured groove on the battery mounting plate to accommodate the battery and setting a drain groove on the plate body. The drain groove is connected to the battery's explosion-proof valve. When an abnormal situation occurs, such as a sudden increase in internal pressure exceeding the safety threshold, the battery's explosion-proof valve can open normally, spraying high-pressure and high-heat gas through the drain groove and then discharging it to the outside of the casing through the pressure relief valve on the battery pack. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the battery fixing plate provided in an embodiment of this application;

[0030] Figure 2 This is a partially exploded structural diagram of the battery pack provided in an embodiment of this application;

[0031] Figure 3 for Figure 2 The diagram shows the structural arrangement of the battery mounting plate and the battery in the battery pack.

[0032] Figure 4 for Figure 2 The diagram shows the structure of the battery in the battery pack.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Battery fixing plate; 10-Plate body; 20-Contouring groove; 21-Fixing groove; 22-Explosion-proof groove; 30-Smoke exhaust section; 40-Drainage groove; 200-Battery; 201-Explosion-proof valve; 300-Battery pack; 301-Housing shell; 302-Receiving cavity; 303-Top cover; 304-Pressure relief valve; 305-Protective plate; 306-Connecting piece; 307-Fixing panel. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0038] The terms “first,” “second,” and “third” (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0040] Currently, in the assembly and manufacturing of common battery packs, multiple batteries are typically placed onto a fixed base plate, then a fixing panel, connecting plates, and protection plates are assembled to connect the batteries, which are then placed into a casing. Encapsulating adhesive is then applied to the casing to secure the batteries. Finally, a top cover, pressure relief valve, and other components are assembled to form the battery pack. The use of encapsulating adhesive is crucial to ensure the batteries are fully secured to the casing; otherwise, in the event of vibration or drops, the connecting plates or welded joints between the batteries are prone to breakage.

[0041] However, the explosion-proof valve at the bottom of the battery is easily blocked by potting compound. When abnormal situations such as a sudden increase in internal pressure exceeding the safety threshold occur, the explosion-proof valve cannot open, posing a safety hazard of battery pack explosion.

[0042] After repeated consideration and verification, the inventors discovered that the explosion-proof valve on a battery is usually located at the bottom of the battery. If the battery mounting plate used to fix the battery in the battery pack is designed with an upward-facing, closed-bottom groove, the battery can be assembled from above into the groove, and the explosion-proof valve at the bottom of the battery can be located in the closed groove. This can avoid the problem of glue blocking the explosion-proof valve during the filling process. An upward-extending channel can also be built on the battery mounting plate to connect the groove, allowing the gas ejected from the explosion-proof valve to be discharged upwards along the channel, and then discharged to the outside through the pressure relief valve on the battery pack, improving the safety of the battery pack. Foaming adhesive can also be used. By utilizing the characteristic of foaming adhesive to increase its volume after foaming, the volume of glue can be reduced, thereby avoiding the problem of glue flowing into the groove through the assembly gap in the initial state. In addition, the increased volume of the foaming adhesive after foaming increases its height in the casing, bonding and fixing the battery in the casing to the casing, improving the reliability of the battery.

[0043] In view of this, this application provides a battery fixing plate for fixing a battery. The battery fixing plate includes a plate body, on which a contour groove and a drain groove are provided. The contour groove is semi-enclosed to accommodate the battery, and the drain groove is used to communicate with the contour groove so as to communicate with the explosion-proof valve of the battery.

[0044] By setting a contoured groove on the battery mounting plate to accommodate the battery, and setting a drain groove on the plate, which is connected to the battery's explosion-proof valve, the battery's explosion-proof valve can be opened normally when abnormal situations such as a sharp increase in internal pressure exceeding the safety threshold occur. The high-pressure and high-heat gas is ejected through the drain groove and then discharged to the outside of the casing through the pressure relief valve on the battery pack, thereby improving the safety and reliability of the battery pack.

[0045] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0046] Figure 1This is a schematic diagram of the structure of the battery fixing plate provided in an embodiment of this application. Figure 2 This is a partially exploded structural diagram of the battery pack provided in an embodiment of this application. Figure 3 for Figure 2 The diagram shows the structure of the battery mounting plate and the battery in the battery pack. Figure 4 for Figure 2 The diagram shows the structure of the battery in the battery pack.

[0047] like Figure 1 and Figure 2 As shown in the embodiment of this application, the battery fixing plate 100 is used in the battery pack 300 to fix the battery 200. The battery fixing plate 100 includes a plate body 10 for placing the battery 200.

[0048] Optionally, the shape of the plate 10 is the same as the cross-section of the battery pack 300, so as to facilitate the insertion of the battery 200 into the housing 301 of the battery pack 300 through the plate 10.

[0049] In one possible implementation, the battery pack 300 is a cuboid, and the plate 10 is a rectangle with the same cross-section as the cuboid.

[0050] The plate 10 is provided with a contour groove 20. The contour groove 20 is formed on the top surface of the plate 10. The contour groove 20 is used to accommodate the battery 200, thereby fixing the battery 200 to the plate 10.

[0051] The contour groove 20 is semi-enclosed, meaning it is a groove that is closed at the bottom and open at the top. The bottom of the battery 200 is accommodated in the contour groove 20, thereby sealing the top of the contour groove 20 and preventing glue from flowing into the contour groove 20 during glue pouring.

[0052] like Figure 4 As shown, the bottom of the battery 200 is provided with an explosion-proof valve 201. When the battery 200 is contained in the contour groove 20, the explosion-proof valve 201 is located in the contour groove 20, that is, the contour groove 20 has a communication port facing the explosion-proof valve 201 of the battery 200, so as to discharge the excrement of the battery 200 to the outside.

[0053] The explosion-proof valve 201 is placed in the contour groove 20. The contour groove 20 is matched with the bottom of the battery 200, which can prevent the glue from blocking the explosion-proof valve 201 during the glue pouring process, thus ensuring the normal use of the explosion-proof valve 201.

[0054] In one possible implementation, the plate 10 is provided with a plurality of contoured grooves 20, thereby fixing a plurality of batteries 200 to the battery fixing plate 100.

[0055] The number of contoured grooves 20 corresponds to the number of batteries 200.

[0056] Optionally, multiple contoured grooves 20 are arranged in an array on the plate 10 to make full use of the space of the plate 10.

[0057] In one possible implementation, the contoured groove 20 includes a fixed groove 21 and an explosion-proof groove 22. The fixed groove 21 and the explosion-proof groove 22 are in communication with each other. The fixed groove 21 is used to accommodate the battery 200, and the end face of the battery 200 completely covers the explosion-proof groove 22. The communication port of the explosion-proof groove 22 is adapted to face the explosion-proof valve 201 of the battery 200.

[0058] By completely covering the explosion-proof groove 22 with the end face of the battery 200, the explosion-proof groove 22 can be sealed, so that the explosion-proof valve 201 of the battery 200 facing the explosion-proof groove 22 will not be blocked or covered by glue during glue filling.

[0059] In one possible implementation, the contour groove 20 is a stepped hole, and the explosion-proof groove 22 and the fixing groove 21 are arranged along the depth direction of the contour groove 20. The explosion-proof groove 22 is located in the fixing groove 21 away from the battery 200, that is, on the bottom wall of the fixing groove 21. The diameter of the explosion-proof groove 22 is smaller than the diameter of the fixing groove 21.

[0060] The battery 200 is positioned on the step of the stepped hole, meaning it is housed in the fixing groove 21 with its bottom facing the explosion-proof groove 22, thus placing the explosion-proof valve 201 within the groove 22. The bottom of the battery 200 covers the explosion-proof groove 22, thereby sealing the top of the groove 22 and preventing adhesive from flowing into it during filling, thus blocking the explosion-proof valve 201 and ensuring its normal operation.

[0061] In one possible implementation, when the battery 200 is disposed in the contour groove 20, there is a gap between the bottom wall of the contour groove 20 and the battery 200 contained in the contour groove 20, and the width of the gap is in the range of 3mm-5mm.

[0062] In one possible implementation, the gap between the bottom wall of the contoured groove 20 and the battery 200 is the explosion-proof groove 22, and the width of the gap is the depth of the explosion-proof groove 22.

[0063] In one possible implementation, when the battery 200 is disposed in the contour groove 20, there is a gap between the sidewall of the contour groove 20 and the battery 200 contained in the contour groove 20, and the width of the gap is in the range of 0.1mm-0.2mm.

[0064] The spacing provides space for the explosion-proof valve 201 at the bottom of the battery 200 to open. If the spacing is too small, the bottom wall of the contour groove 20 will block the explosion-proof valve 201, causing the explosion-proof valve 201 to fail.

[0065] In one possible implementation, there is a gap between the sidewall of the contoured groove 20 and the battery 200, i.e., the diameter of the fixing groove 21 is larger than the diameter of the battery 200, and the width of the gap is half the difference between the diameter of the fixing groove 21 and the diameter of the battery 200.

[0066] In one possible implementation, the battery 200 is a cylindrical battery, and both the fixing groove 21 and the explosion-proof groove 22 are circular grooves.

[0067] In one possible implementation, the battery 200 is a cube, such as a stacked battery, and the corresponding fixing slot 21 can be a rectangle.

[0068] Optionally, the explosion-proof groove 22 can also be configured in other shapes, as long as it can accommodate the explosion-proof valve 201 at the bottom of the battery 200.

[0069] In one possible implementation, the plate 10 is further provided with a drain groove 40. The drain groove 40 is connected to the contour groove 20 so as to correspond to the explosion-proof valve 201 of the battery 200.

[0070] When the internal pressure of the battery 200 increases sharply and exceeds the safety threshold, the explosion-proof valve 201 at the bottom of the battery 200 will spray out high-pressure and high-heat gas. The contoured groove 20 allows the sprayed gas to first be discharged into the corresponding contoured groove 20, then discharged through the drain groove 40 connected to the contoured groove 20, and finally discharged to the outside of the battery pack 300 through the pressure relief valve 304 in the battery pack 300.

[0071] The drain tank 40 can also drain the electrolyte, contents and other substances from the battery 200.

[0072] Optionally, the drain trough 40 is connected to both the fixed trough 21 and the explosion-proof trough 22.

[0073] In one possible implementation, the drain groove 40 is disposed on the side wall of the contour groove 20, with one end extending toward the bottom of the contour groove 20 and the other end extending outward from the contour groove 20. That is, the drain groove 40 is a groove extending upward from the side wall of the contour groove 20 of the plate 10. When the battery 200 is accommodated in the contour groove 20, the side wall of the battery 200 closes one side of the drain groove 40, thereby forming an outwardly extending drain channel, and the bottom of the drain channel communicates with the contour groove 20, and the top opening communicates with the internal space of the battery pack 300.

[0074] In one possible implementation, the battery mounting plate 100 further includes a smoke exhaust section 30. The smoke exhaust section 30 is disposed on the plate body 10 and extends upward. A drain groove 40 is disposed on the smoke exhaust section 30.

[0075] Optionally, the smoke exhaust section 30 is a portion of the sidewall of the fixing groove 21, extending away from the plate 10. The discharge groove 40 is provided on the sidewall of the fixing groove 21 and the smoke exhaust section 30.

[0076] In one possible implementation, the drain trough 40 is located between adjacent contoured grooves 20, and the drain trough 40 is connected to the adjacent contoured grooves 20 respectively.

[0077] Optionally, a drain trough 40 is provided between two adjacent contour grooves 20, and the drain trough 40 is connected to the two contour grooves 20 respectively.

[0078] The opposing sidewalls of the two contoured grooves 20 extend outward to form a smoke exhaust section 30 located between the two contoured grooves 20. An upwardly extending exhaust groove 40 is provided on the smoke exhaust section 30. Two batteries 200 are respectively accommodated in one contoured groove 20. The sidewalls of the two batteries 200 respectively close one side of the exhaust groove 40, thereby forming an upwardly extending exhaust channel, and the bottom of the exhaust channel is connected to the two contoured grooves 20 respectively.

[0079] In other possible implementations, the drain trough 40 is located between adjacent contoured troughs 20 and is connected to at least two contoured troughs 20, such as two, three or four contoured troughs 20.

[0080] In one possible implementation, the drain trough 40 corresponds one-to-one with the contour trough 20, that is, one contour trough 20 corresponds to one drain trough 40, and the drain trough 40 is connected to the corresponding contour trough 20.

[0081] The use of a single drain channel for every two batteries 200, or a separate drain channel for each battery 200, can prevent heat spread.

[0082] In one possible implementation, the drain trough 40 is generally hollow and strip-shaped. The strip-shaped drain trough 40 is formed by slotting the side wall of the contoured groove 20 and extending upwards. For example, the adjacent side walls of two adjacent contoured grooves 20 are connected to each other, and the drain trough 40 is provided on these side walls. In this case, the drain trough is hollow and strip-shaped, with its two openings communicating with the two contoured grooves 20 respectively. One end of the drain trough 40 extends towards the bottom of the contoured groove 20, and the other end extends outwards from the contoured groove 20. In use, the two openings of the drain trough 40 are respectively closed by the corresponding batteries 200, thereby forming an upwardly extending draining channel.

[0083] In one possible implementation, the drain trough 40 is a separate trough on the plate 10, such as a hollow columnar structure, whose bottom is connected to the corresponding contoured trough 20. For example, if it is located between two contoured troughs 20, the two contoured troughs 20 are connected to the bottom of the drain trough 40 respectively; if it is located between three contoured troughs 20, the three contoured troughs 20 are connected to the bottom of the drain trough 40 respectively; if it is located between four contoured troughs 20, the four contoured troughs 20 are connected to the bottom of the drain trough 40 respectively, and so on.

[0084] Optionally, the location, method, and number of drainage troughs 40 can be designed according to actual needs.

[0085] In one possible implementation, along the opening direction of the contour groove 20, that is, along the thickness direction of the plate 10, the length of the discharge groove 40 is L1, which is the sum of the depth of the fixing groove 21 and the length of the smoke exhaust section 30, and the height of the battery 200 is L2. L1 and L2 satisfy: 1 / 2L2<L1≤L2.

[0086] The length of the drain groove 40 is higher than half the height of the battery 200 to prevent glue from flowing into the drain groove 40. If it is lower than the height of the battery 200, it can prevent the battery fixing plate 100 from being higher than the battery 200 installed on it after assembly, thus reducing unnecessary height loss.

[0087] In one possible implementation, the cross-sectional area of ​​the discharge channel ranges from 10 square millimeters to 100 square millimeters along the communication direction of the discharge channel.

[0088] By setting the opening depth and width of the drain trough 40, that is, setting the area of ​​the drain trough 40 along the opening direction, it is necessary to ensure that the high temperature and heat gas discharged by the explosion-proof valve 201 can be discharged smoothly, without affecting the structural strength of the battery fixing plate 100.

[0089] In one possible implementation, the plate 10 is also provided with weight reduction holes, which are used to reduce the weight of the battery pack 300 and at the same time improve the heat dissipation of the battery pack 300.

[0090] The battery fixing plate 100 provided in this application embodiment is provided with a contour groove 20, which is used to accommodate the battery 200, and the contour groove 20 faces the explosion-proof valve 201 of the battery 200.

[0091] By setting a contoured groove 20 on the battery fixing plate 100, the battery 200 is accommodated in the contoured groove 20, and the explosion-proof valve 201 of the battery 200 is also accommodated in the contoured groove 20. This prevents the glue from blocking the explosion-proof valve 201 during glue filling. When an abnormal situation occurs, such as a sudden increase in pressure inside the battery 200 exceeding the safety threshold, the explosion-proof valve 201 of the battery 200 can be opened normally, spraying high-pressure and high-heat gas into the contoured groove 20, and then discharging it to the outside of the housing 301 through the pressure relief valve 304 on the battery pack 300, thereby improving the safety and reliability of the battery pack 300.

[0092] Furthermore, this application embodiment also provides a battery pack 300, including a housing 301, the aforementioned battery fixing plate 100, and a battery 200. The housing 301 has a receiving cavity 302. The battery fixing plate 100 and the battery 200 are respectively disposed in the receiving cavity 302. The battery 200 is disposed in a contoured groove 20 of the battery fixing plate 100, and the explosion-proof valve 201 of the battery 200 is located in the contoured groove 20.

[0093] In one possible implementation, the battery pack 300 also includes expanding foam disposed in the receiving cavity 302.

[0094] Expanding foam is initially in a liquid state and eventually becomes a foam state.

[0095] After the foam is expanded, its volume will increase. Since the foam is placed in the receiving cavity 302, its height in the housing 301 will increase significantly, which can fully bond the battery 200, the battery fixing plate 100 and the side wall of the receiving cavity 302 to each other.

[0096] In the housing 301, the top surface of the plate 10 of the battery fixing plate 100 is higher than the liquid level of the foam in the initial state.

[0097] By setting the height of the expanding foam, liquid adhesive can be prevented from flowing into the contoured groove 20 through the assembly gap between the battery 200 and the contoured groove 20, thus preventing it from blocking the explosion-proof valve 201 at the bottom of the battery 200.

[0098] The height of the foam is greater than the top surface of the battery fixing plate 100 and less than the height of the top of the drain trough 40. That is, in the housing 301, the top surface of the smoke exhaust part 30 on the plate 10 is higher than the height of the foam.

[0099] By setting the height of the exhaust section 30, it is possible to prevent the foam from blocking the drain groove 40 opened on the exhaust section 30 after foaming, thereby sealing the exhaust channel used for exhaust.

[0100] The foam-like expanding foam cannot flow back into the contour groove 20 and the drain groove 40 through the assembly gaps; ultimately, the battery 200, the battery fixing plate 100 and the side wall of the receiving cavity 302 can be fully bonded to each other, while the pressure relief valve 304 and the drain channel on the battery pack 300 will not be blocked, thus solving the safety problem of the battery 200 and ensuring reliable fixation.

[0101] In one possible implementation, the battery pack 300 further includes a top cover 303. The top cover 303 is disposed on the housing 301. The top cover 303 is used to seal the receiving cavity 302, thereby sealing the battery within the housing 301. A pressure relief valve 304 is provided on the top cover 303.

[0102] In one possible implementation, the battery pack 300 further includes a protection plate 305, a connecting piece 306, and a fixing panel 307. The protection plate 305 is located on top of the battery 200 and is used to protect the battery. The connecting piece 306 is connected to multiple batteries 200 respectively, thereby connecting the batteries 200 in series or parallel. The fixing panel 307 is used to cooperate with the battery fixing plate 100 to fix the multiple batteries 200.

[0103] In one possible implementation, the battery pack 300 also includes a battery management system (BMS) for monitoring and managing the charge and discharge states of the battery 200.

[0104] In one possible implementation, the battery pack 300 also includes a temperature sensor electrically connected to the battery management system. The temperature sensor is used to monitor the temperature of the battery 200 and trigger an alarm when the temperature exceeds a preset value.

[0105] During assembly, first, a certain amount of expanding foam is poured into the receiving cavity 302, and then the battery fixing plate 100 is placed in, ensuring that the top surface of the plate 10 of the battery fixing plate 100 is higher than the liquid level of the expanding foam; then, the batteries 200 are placed into the contour groove 20 of the battery fixing plate 100 in sequence, and the fixing panel 307 is assembled to fix multiple batteries 200; the connecting piece 306 is connected to the battery 200 by welding or other means; the protection plate 305 is connected, and finally the upper cover 303 with the pressure relief valve 304 is assembled. After the expanding foam has foamed, the battery 200, the battery fixing plate 100 and the side wall of the receiving cavity 302 are fully bonded to each other to form the battery pack 300.

[0106] Furthermore, this application embodiment also provides an electrical device, including the aforementioned battery pack. The electrical device also includes an electrical appliance. The battery pack is used to provide electrical energy to the electrical appliance.

[0107] The electrical equipment in this application embodiment can be a vehicle, such as a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0108] In addition, electrical equipment can also serve as other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, and spacecraft. Among these, spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery fixing plate, characterized in that, The device includes a plate (10), on which a contoured groove (20) and a drain groove (40) are provided. The contoured groove (20) is semi-enclosed to accommodate a battery (200). The drain groove (40) is used to communicate with the contoured groove (20) to communicate with the explosion-proof valve (201) of the battery (200). The adjacent side walls of the two contoured grooves (20) are connected. The drain groove (40) is located on the side wall and is connected to the two contoured grooves (20) on both sides respectively. One end of the drain groove (40) extends to the bottom of the contoured groove (20) and the other end extends outward from the contoured groove (20).

2. The battery fixing plate according to claim 1, characterized in that, The contoured groove (20) has a communication port adapted to face the explosion-proof valve (201) of the battery (200) to discharge the battery's waste outwards.

3. The battery fixing plate according to claim 1, characterized in that, The drain trough (40) is located on the side wall of the contour trough (20), with one end extending toward the bottom of the contour trough (20) and the other end extending outward from the contour trough (20).

4. The battery fixing plate according to claim 1, characterized in that, The drain trough (40) is a hollow columnar structure disposed on the plate (10).

5. The battery fixing plate according to any one of claims 1-4, characterized in that, The contour groove (20) is provided in multiple ways, and the discharge groove (40) is located between adjacent contour grooves (20) and is connected to at least two contour grooves (20) respectively.

6. The battery fixing plate according to any one of claims 1-4, characterized in that, The drain trough (40) corresponds one-to-one with the contour trough (20) and is connected to the corresponding contour trough (20).

7. The battery fixing plate according to any one of claims 1-4, characterized in that, Along the opening direction of the contour groove (20), the length of the drain groove (40) is L1, and the height of the battery (200) is L2. L1 and L2 satisfy: 1 / 2L2<L1≤L2.

8. The battery fixing plate according to any one of claims 1-4, characterized in that, The drain groove (40) cooperates with the battery (200) contained in the contour groove (20) to form a drain channel extending outward from the side wall of the contour groove (20). The cross-sectional area of ​​the drain channel is in the range of 10 square millimeters to 100 square millimeters along the communication direction of the drain channel.

9. The battery fixing plate according to any one of claims 1-4, characterized in that, The contoured groove (20) includes a fixed groove (21) and an explosion-proof groove (22). The fixed groove (21) and the explosion-proof groove (22) are interconnected. The fixed groove (21) is used to accommodate the battery (200) and the end face of the battery (200) completely covers the explosion-proof groove (22). The communication port of the explosion-proof groove (22) is adapted to face the explosion-proof valve (201) of the battery (200).

10. The battery fixing plate according to claim 9, characterized in that, The explosion-proof groove (22) and the fixing groove (21) are arranged along the groove depth direction of the contour groove, and the explosion-proof groove (22) is located in the fixing groove (21) away from the battery (200).

11. The battery fixing plate according to any one of claims 1-4, characterized in that, There is a gap between the bottom wall of the contoured groove (20) and the battery (200) contained in the contoured groove (20).

12. The battery fixing plate according to claim 11, characterized in that, The width of the interval is in the range of 3mm-5mm.

13. The battery fixing plate according to any one of claims 1-4, characterized in that, There is a gap between the sidewall of the contoured groove (20) and the battery (200) contained in the contoured groove (20).

14. The battery fixing plate according to claim 13, characterized in that, The width of the gap is in the range of 0.1mm-0.2mm.

15. A battery pack, characterized in that, include: A housing (301) having a receiving cavity (302) therein; A battery fixing plate (100) is disposed in the receiving cavity (302), and the battery fixing plate (100) is the battery fixing plate as described in any one of claims 1-14; A battery (200) is disposed in the contour groove (20), and the explosion-proof valve (201) of the battery (200) is located in the contour groove (20).

16. The battery pack according to claim 15, characterized in that, The battery pack (300) also includes expanding foam, which is disposed in the receiving cavity (302). The height of the expanding foam is greater than the top surface of the battery fixing plate (100) and less than the height of the top of the drain groove (40).

17. The battery pack according to claim 15, characterized in that, The battery pack (300) also includes a top cover (303), which is disposed on the housing (301). The top cover (303) is used to seal the receiving cavity (302), and the top cover (303) is provided with a pressure relief valve (304).

18. An electrical appliance, characterized in that, Includes the battery pack (300) as described in any one of claims 15-17.

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