Battery pack

Abstract

Battery pack, including: a housing (1) having an internal storage cavity, wherein a battery assembly (11) is arranged in the storage cavity; wherein an explosion protection area (111) is provided on the battery assembly (11); a cover plate assembly (2) which is arranged on the battery assembly (11) and covers a surface of the explosion protection area (111), such that an outlet channel (23) is formed between the cover plate assembly (2) and the surface of the explosion protection area (111), wherein the outlet channel (23) extends in the same direction as battery rows in the battery assembly (11) and each outlet channel (23) corresponds one to one to each battery row.

Description

AREA OF TECHNOLOGY

[0001] The present utility model relates to the field of battery technology, in particular a battery pack. STATE OF THE ART

[0002] Currently, batteries in electric vehicles are typically installed at the bottom of the vehicle chassis. Due to the limited ground clearance of the chassis, installing the batteries at the bottom further reduces the distance to the ground. The lower the ground clearance and the lower the chassis sits, the worse the vehicle's handling. To minimize the impact of the batteries on ground clearance, the battery pack cover has been omitted, and the chassis itself now acts as the battery pack cover, meaning that the top of the battery pack rests directly against the chassis.

[0003] However, this solution directly reduces the distance between the explosion protection valve on the battery and the chassis. If the battery malfunctions during actual use, the gas escaping from the explosion protection valve will directly affect the chassis, or the gas may not be properly vented due to the small distance between the explosion protection valve and the chassis, seriously compromising the battery's safety performance. SUMMARY OF THE USAGE SAMPLE

[0004] Against this background, the present utility model provides a battery pack to solve the problems of the direct impact of gas from the explosion protection valves on the chassis or the inability to properly vent the gas.

[0005] In a first aspect, the present utility model provides a battery pack comprising the following: a housing having an internal storage cavity, wherein a battery assembly is arranged in the storage cavity; wherein an explosion protection area is provided on the battery assembly; a cover plate assembly arranged on the battery assembly and covering a surface of the explosion protection area, such that an outlet channel is formed between the cover plate assembly and the surface of the explosion protection area, wherein the outlet channel extends in the same direction as battery rows in the battery assembly, and wherein each outlet channel corresponds one-to-one to each battery row.

[0006] Advantageous effects: Since this embodiment provides an outlet channel inside the cover plate assembly, a predetermined gap exists between the explosion protection zone formed by the explosion protection valve and the vehicle chassis when, in practical use, the battery pack is installed at the bottom of the vehicle chassis and the cover plate assembly abuts the chassis. In the event of a battery malfunction, the gas escaping from the explosion protection valve is diverted through the outlet channel directly to both sides of the battery pack, instead of directly impacting the chassis, thus increasing vehicle safety. The outlet channel ensures proper gas venting and thus prevents a battery explosion caused by faulty gas venting, significantly improving the battery's safety characteristics.Furthermore, since the electrode terminals on both sides of the battery assembly are higher than the explosion protection valve, the outlet channel occupies the space between the electrode terminals on both sides, ensuring that the cover plate assembly does not take up much space in the vertical direction and maintains a normal distance from the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To better illustrate the technical solutions in the particular embodiments or related technologies of the present utility model, the drawings necessary for describing these particular embodiments or related technologies are briefly described below. It is understood that the drawings described below represent some embodiments of the present utility model. A person skilled in the art can create further drawings based on these drawings without any creative effort. Fig. Figure 1 is a schematic representation of the overall structure of a battery pack according to an embodiment of the present utility model; Fig. Figure 2 is a schematic representation of the internal structure of the battery pack after removing the cover plate assembly. Fig. 1; Fig. Figure 3 is an enlarged schematic representation of the mounting assembly made of Fig. 2; Fig. Figure 4 is a cross-sectional view of the interior of the battery pack when the mounting assembly is not properly aligned with the explosion protection area, according to an embodiment of the present utility model; Fig. Figure 5 is a cross-sectional view of the interior of the battery pack when the mounting assembly is aligned with the explosion protection area, according to an embodiment of the present utility model.

[0008] Reference symbol: 1 - Housing; 11 - Battery assembly; 111 - Explosion protection area; 112 - Electrode connection; 2 - Cover plate assembly; 21 - Mounting assembly; 211 - Support foot; 2111 - Horizontal section; 2112 - Vertical section; 212 - Support plate; 213 - Support rib; 214 - Foam pad; 22 - Cover plate component; 221 - Adhesive layer; 222 - Mica plate; 23 - Outlet channel. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0009] To clarify the objectives, technical solutions, and advantages of the embodiments of this utility model, the technical solutions in the embodiments are described clearly and completely in conjunction with the drawings. It is obvious that the described embodiments represent only some, and not all, embodiments of this utility model. All further embodiments that a person skilled in the art can deduce without inventive effort based on the embodiments of this utility model fall within the scope of protection of this utility model.

[0010] It should be noted that in the description of this utility model, terms indicating orientation or position ratios, such as "central," "top," "bottom," "left," "right," "vertical," "horizontal," "inside," and "outside," are based on the orientations or position ratios depicted in the drawings. These terms serve only for the convenience and simplification of the description and do not indicate or imply that the designated devices or elements must have specific orientations or be designed and operated in specific orientations. Therefore, they are not to be understood as limitations of this utility model. Furthermore, terms such as "first," "second," and "third" are used solely for descriptive purposes and should not be understood as indicating or implying any relative priority.

[0011] It should be noted that, unless expressly stated otherwise and limited, the terms "assembled", "connected", and "coupled" in the description of this utility model are to be understood in a broad sense. For example, they may refer to permanent connections, detachable connections, or integral connections; mechanical or electrical connections; direct or indirect connections via intermediate elements or internal communication between two elements; wireless or wired connections. A person skilled in the art may understand the specific meanings of these terms in this utility model according to specific situations.

[0012] Furthermore, the technical features involved in various embodiments described below can be combined with each other, as long as they do not contradict each other.

[0013] Currently, batteries in electric vehicles are typically installed at the bottom of the vehicle chassis. Due to the limited ground clearance of the chassis, installing the batteries at the bottom further reduces the distance to the ground. The lower the ground clearance and the lower the chassis sits, the worse the vehicle's handling. To minimize the impact of batteries on ground clearance, the battery pack cover has been omitted, and the chassis itself now acts as the battery pack cover, meaning the top of the battery pack rests directly against the chassis. However, this solution immediately reduces the distance between the battery's explosion-proof valve and the chassis.If the battery malfunctions during actual use, the gas escaping from the explosion protection valve will directly affect the chassis, or the gas may not be properly vented due to the small distance between the explosion protection valve and the chassis, seriously impairing the battery's safety performance.

[0014] Against this background, the present utility model provides a battery pack to solve the problems of the direct impact of gas from the explosion protection valves on the chassis or the inability to properly vent the gas.

[0015] The following description refers to the Fig. 1 to 5 describe an embodiment of the present utility model.

[0016] According to one embodiment of the present utility model, a battery pack is provided comprising a housing 1 and a cover plate assembly 2.

[0017] In this embodiment, the housing 1 has, in particular, a storage cavity in which a battery assembly 11 is arranged. The battery assembly 11 comprises a plurality of battery rows, and an explosion protection area 111 is provided on the battery assembly 11. As in Fig. As shown in Figure 2, each battery is provided with an explosion protection valve, and when batteries are arranged to form a battery row, the area formed by all the explosion protection valves on the battery row constitutes the explosion protection area 111, so that the direction of extension of the explosion protection area 111 is the same as the direction of extension of the battery row.

[0018] In this embodiment, the cover plate assembly 2 is also arranged on the battery assembly 11 and covers the surface of the explosion protection zone 111 in such a way that an outlet channel 23 is formed between the cover plate assembly 2 and the surface of the explosion protection zone 111. The outlet channel 23 extends in the same direction as the explosion protection zone 111 and, naturally, in the same direction as the battery rows in the battery assembly 11. Furthermore, the outlet channels 23 correspond one-to-one to the battery rows in the battery assembly 11, and the battery rows, of course, correspond one-to-one to the explosion protection zones 111.In practical application, the outlet channel 23 can extend directly to both sides of the battery assembly 11 or the housing 1, so that in the event of a battery malfunction, the gas escaping from the explosion protection valve is immediately diverted through the outlet channel 23 to both sides of the battery pack, instead of acting directly on the chassis.

[0019] Since this embodiment provides an outlet channel 23 inside the cover plate assembly 2, in such an arrangement, when the battery pack is installed on the floor of the vehicle chassis in practical use and the cover plate assembly 2 abuts the vehicle chassis, there is a predetermined gap between the explosion protection area 111 formed by the explosion protection valve and the vehicle chassis. In the event of a battery malfunction, the gas escaping from the explosion protection valve is discharged through the outlet channel 23 directly to both sides of the battery pack, instead of acting directly on the chassis, thereby increasing vehicle safety. The outlet channel 23 ensures proper gas venting and thus prevents a battery explosion caused by faulty gas venting, which significantly improves the battery's safety characteristics.Furthermore, since the electrode terminals 112 on both sides of the battery assembly 11 are higher than the explosion protection valve, the outlet channel 23 occupies the space between the electrode terminals 112 on both sides, thus ensuring that the cover plate assembly 2 does not take up much space in the vertical direction and maintains a normal distance to the ground.

[0020] In an optional embodiment, the cover plate assembly 2 also comprises a mounting assembly 21 and a cover plate component 22.

[0021] In this embodiment, several mounting assemblies 21 are arranged on the battery assembly 11, with an outlet channel 23 being provided in the mounting assembly 21, and the mounting assembly 21 extends in the same direction as the explosion protection area 111. That is, the mounting assembly 21 is aligned with the explosion protection area 111, thus ensuring that the outlet channel 23 is aligned with the explosion protection area 111.

[0022] The cover plate component 22 also covers the housing 1 and abuts the mounting assembly 21.

[0023] In this embodiment, by arranging the outlet channel 23 directly in the mounting assembly 21 and aligning the mounting assembly 21 with the explosion protection valve, the mounting assembly 21 not only provides a venting functionality but also increases the overall static strength of the cover plate assembly 2, thus ensuring proper gas venting from the battery assembly 11.

[0024] In another optional embodiment, the cover plate assembly 2 also comprises a mounting assembly 21 and a cover plate component 22.

[0025] In this embodiment, several mounting assemblies 21 are arranged on the battery assembly 11, each mounting assembly 21 being located between two adjacent explosion protection zones 111 and extending in the same direction as the explosion protection zone 111. In the vertical direction, the upper end face of the mounting assembly 21 is higher than the electrode terminals 112 of the battery assembly 11. Furthermore, the cover plate component 22 covers the housing 1, and two adjacent mounting assemblies 21 enclose each other together with the cover plate component 22 to form an outlet channel 23.

[0026] This means that the mounting assembly 21 is offset from the explosion protection area 111, serves as a side wall of the outlet channel 23 and provides a support for the cover plate component 22.

[0027] In this embodiment, by forming the outlet channel 23 by enclosing the cover plate component 22 and the mounting assembly 21, and by offsetting the mounting assembly 21 relative to the explosion protection valve, the space of the outlet channel 23 can be suitably enlarged, which further improves the flow rate of the gas discharged from the battery assembly 11 and prevents an explosion due to high gas pressure during gas discharge.

[0028] In an optional embodiment, the mounting assembly 21 also includes support feet 211 and a support plate 212.

[0029] In this embodiment, two support feet 211 are arranged side by side on the battery assembly 11, extending in the same direction as the explosion protection area 111, and the upper end surface of the support feet 211 is higher than the electrode terminals 112 of the battery assembly 11. The support plate 212 also covers the two support feet 211 in such a way that the support plate 212 and the two support feet 211 enclose each other to form the outlet channel 23. If the outlet channel 23 is formed directly in the mounting assembly 21 and the mounting assembly 21 is offset from the explosion protection area 111, the mounting assembly 21 can, of course, serve both as a support and as a side wall of the outlet channel 23. If the mounting assembly 21 is aligned with the explosion protection area 111, it can serve directly as an outlet channel 23, thereby improving the versatility of the mounting assembly 21.

[0030] In the present embodiment, the support foot 211 extends in the same direction as the explosion protection area 111, thus aligning its direction with that of the explosion protection area 111. This enables the support foot 211 to provide comprehensive support for the entire battery pack while simultaneously facilitating the dissipation of gas or heat. Furthermore, by positioning the upper end face of the support foot 211 higher than the electrode terminals 112 of the battery assembly 11, the arrangement prevents escaping gas or liquid from splashing onto the electrode terminals 112. This creates an enclosed space around the electrode terminals 112, preventing short circuits or other electrical faults and further enhancing battery safety.

[0031] In an optional embodiment, the support foot 211 also comprises a horizontal section 2111 and a vertical section 2112.

[0032] In this embodiment, the horizontal section 2111 is arranged on the battery assembly 11 and extends in the same direction as the explosion protection area 111. The vertical section 2112 is arranged on the horizontal section 2111 and extends in the same direction as the explosion protection area 111, its upper side being covered by the support plate 212.

[0033] In this way, the horizontal section 2111 serves as the base of the support foot 211 for stable attachment to the battery assembly 11, while the vertical section 2112 can serve as the side wall of the outlet channel 23. Regarding the method of attachment between the horizontal section 2111 and the battery assembly 11, they can be either permanently or detachably connected. Welding or adhesive bonding can be used for permanent connections. Detachable connections can be achieved using methods such as screws and holes, snap mechanisms, or magnetic fasteners.

[0034] The following examples illustrate methods of detachable connection. For instance, additional mounting plates may be provided on the battery assembly 11, the number of which may be varied by relevant professionals (1, 2, 3, 4, etc.). Screw holes may be provided in the mounting plates that correspond to the holes in the horizontal section 2111, so that screws may be passed through both sets of holes to connect the battery assembly 11 and the horizontal section 2111. Furthermore, when using snap-fit ​​mechanisms, clamping clips may be provided on the battery assembly 11, the number of which is variable (1, 2, 3, 4, etc.), and corresponding slots may be provided in the horizontal section 2111 to engage the clips. In the case of magnetic connections, magnets may be installed on the battery assembly 11, the number of which is variable (1, 2, 3, 4, etc.).), and for magnetic fastening, corresponding opposite-polarity magnets can be arranged in the horizontal section 2111.

[0035] Of course, these examples of permanent and detachable connections are merely illustrative and not limiting. A person skilled in the art can make modifications based on the actual circumstances, as long as the same technical effect is achieved.

[0036] In an optional embodiment, the horizontal section 2111 is also parallel to the support plate 212 and forms a “ "-shaped structure for the mounting assembly 21.

[0037] In this embodiment, the horizontal section 2111 and the vertical section 2112 together form a stable frame structure that increases the overall structural rigidity and reduces deformation under external shock or impact. This structure distributes loads uniformly, ensuring that the battery assembly 11 remains stable under various operating conditions. The horizontal section 2111 and the vertical section 2112 extend in the same direction as the explosion protection area 111, thereby ensuring that gas or heat is easily dissipated along predetermined paths, thus reducing the risk of internal pressure build-up. The design of the horizontal section 2111 and the vertical section 2112 optimizes the width of the outlet channel 23, thus providing sufficient space for the gas flow or heat flux.If the horizontal section 2111 and the vertical section 2112 are made of thermally conductive materials such as metal, they can effectively conduct heat, which assists the battery assembly 11 in dissipating heat and extends the battery's lifespan.

[0038] In an optional embodiment, the mounting assembly 21 also comprises a plurality of support ribs 213, which are spaced apart from each other on the surface of the support plate 212 near the battery assembly 11 and extend in the same direction as the explosion protection area 111.

[0039] In this arrangement, the support ribs 213 can significantly improve the compression resistance of the support plate 212 and prevent deformation or fracture under external compressive load. The design of the multiple support ribs 213 also increases the stiffness of the support plate 212, enhances its robustness, and improves its resistance to external forces acting on the battery pack. Likewise, if the support ribs 213 are made of thermally conductive materials such as metal, they can act as heat conduction paths, thereby facilitating faster heat transfer from the battery assembly 11 to the support plate 212, thus improving the overall efficiency of heat dissipation.

[0040] In an optional embodiment, the mounting assembly 21 further comprises a plurality of foam pads 214 applied to the surface of the support plate 212 near the battery assembly 11, and the multiple support ribs 213 divide the support plate 212 into a plurality of installation areas, each installation area being provided with the foam pad 214.

[0041] In this embodiment, the foam pads 214 exhibit good energy absorption properties and can absorb and dissipate vibrations and shocks acting on the battery assembly 11 during transport and use, thereby protecting the battery assembly 11 from damage. The foam pads 214 can also reduce vibration noise generated during operation of the battery assembly 11, thus improving the user experience. Furthermore, the foam pads 214 can prevent the leakage of electrolyte or other liquids from inside the battery, thereby preventing damage to other parts of the battery assembly 11.

[0042] The foam pads 214 can of course be replaced by other materials that have the same functions. This embodiment is purely illustrative and not limiting. The person skilled in the art can make changes based on the actual circumstances, as long as the same technical effect is achieved.

[0043] In an optional embodiment, the cover plate component 22 further comprises an adhesive layer 221 and a mica plate 222. In this embodiment, the adhesive layer 221 is adhered, in particular along the vertical direction, to the upper end face of the mounting assembly 21. The mica plate 222 covers the surface of the adhesive layer 221 facing away from the mounting assembly 21 and is adhered to the adhesive layer 221.

[0044] This embodiment provides the mica plate 222 with this arrangement. As an excellent electrically insulating material with high voltage resistance and high heat resistance, it can effectively prevent internal electrical short circuits in the battery assembly 11, thus increasing safety. The covering with the mica plate 222 can increase the rigidity of the cover plate component 22, reducing deformation due to external forces and improving the overall static strength. The adhesive layer 221 also ensures a firm bond between the mica plate 222 and the mounting assembly 21, preventing the mica plate 222 from falling off during use and guaranteeing long-term insulation.The adhesive layer 221 also ensures the bond strength between the mica plate 222 and the mounting assembly 21, thus improving the overall mechanical strength of the cover plate component 22 and enabling it to withstand external pressure and impacts.

[0045] In an optional embodiment, the cover plate assembly 2 also includes a reinforcing grid arranged on the battery assembly 11 and located between two adjacent support assemblies 21. The upper surface of the reinforcing grid abuts the cover plate component 22 in the vertical direction. The reinforcing grid has through-holes and thus does not impede gas venting through the outlet channel 23.

[0046] This embodiment provides a reinforcing grid that, in a vertical arrangement, can effectively support the cover plate component 22, thus preventing deformation or damage under external pressure. The reinforcing grid, located between two adjacent support assemblies 21, can also provide additional lateral support, increasing the overall static strength of the battery assembly 11 and reducing deformation under lateral forces. The presence of the reinforcing grid can therefore improve the overall stiffness of the battery assembly 11, increase its stability, and reduce damage from vibrations or impacts during transport and use.Furthermore, if the reinforcement grid is made of thermally conductive materials such as metal, it can serve as a heat conduction path, thereby supporting faster heat transfer to dissipate heat away from the battery assembly 11 to the cover plate component 22, thus improving the overall effectiveness of heat dissipation.

[0047] Although the embodiments of the present utility model have been described in conjunction with the drawings, skilled persons in the field may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope of protection defined by the attached claims.

Claims

[1] Battery pack, comprising: a housing (1) having an internal storage cavity, wherein a battery assembly (11) is arranged in the storage cavity; wherein an explosion protection area (111) is provided on the battery assembly (11); a cover plate assembly (2) which is arranged on the battery assembly (11) and covers a surface of the explosion protection area (111), such that an outlet channel (23) is formed between the cover plate assembly (2) and the surface of the explosion protection area (111), wherein the outlet channel (23) extends in the same direction as battery rows in the battery assembly (11) and each outlet channel (23) corresponds one to one to each battery row. [2] Battery pack according to claim 1, wherein the cover plate assembly (2) comprises: a plurality of mounting assemblies (21) arranged on the battery assembly (11); wherein an outlet channel (23) is provided in the mounting assembly (21) and the mounting assembly (21) extends in the same direction as the explosion protection area (111); a cover plate component (22) that covers the housing (1); and wherein the cover plate component (22) abuts the mounting assembly (21). [3] Battery pack according to claim 1, wherein the cover plate assembly (2) comprises: a plurality of mounting assemblies (21) arranged on the battery assembly (11), each mounting assembly (21) being situated between two adjacent explosion protection areas (111) and the mounting assembly (21) extending in the same direction as the explosion protection area (111); wherein in a vertical direction an upper end face of the mounting assembly (21) is higher than an electrode terminal (112) of the battery assembly (11); a cover plate component (22) that covers the housing (1); wherein two adjacent mounting assemblies (21) and the cover plate component (22) enclose each other to form the outlet channel (23). [4] Battery pack according to claim 2 or 3, wherein the mounting assembly (21) comprises: a pair of support feet (211) arranged side by side on the battery assembly (11), wherein the support feet (211) extend in the same direction as the explosion protection area (111); a support plate (212) that covers the pair of support feet (211); wherein the support plate (212) and the pair of support feet (211) enclose each other to form the outlet channel (23); wherein an upper end surface of the support plate (212) is higher than the electrode connection (112) of the battery assembly (11). [5] Battery pack according to claim 4, wherein the support foot (211) comprises: a horizontal section (2111) arranged on the battery assembly (11), wherein the horizontal section (2111) extends in the same direction as the explosion protection area (111); a vertical section (2112) arranged on the battery assembly (2111), wherein the vertical section (2112) extends in the same direction as the explosion protection area (111); wherein the top of the vertical section (2112) is covered by the support plate (212). [6] Battery pack according to claim 5, wherein the horizontal section (2111) is parallel to the support plate (212), so that the mounting assembly (21) forms a “ forms a "-shaped structure". [7] Battery pack according to claim 5 or 6, wherein the mounting assembly (21) further comprises: a plurality of support ribs (213) spaced apart at an end face of the support plate (212) near the battery assembly (11); wherein the multiple support ribs (213) extend in the same direction as the explosion protection area (111). [8] Battery pack according to claim 7, wherein the mounting assembly (21) further comprises: a plurality of foam pads (214) arranged at the end face of the support plate 212 near the battery assembly (11); and wherein the multiple support ribs (213) divide the support plate (212) into a plurality of installation areas, each installation area being provided with the foam pad (214). [9] Battery pack according to claim 2 or 3, wherein the cover plate component (22) comprises: an adhesive layer (221) which is adhered to an upper end face of the mounting assembly (21) in a vertical direction; a mica plate (222) which covers an end surface of the adhesive layer (221) facing away from the mounting assembly (21) and is adhered to the adhesive layer (221). [10] Battery pack according to claim 2 or 3, wherein the cover plate assembly (2) further comprises: a reinforcing grid arranged on the battery assembly (11) and located between two adjacent support assemblies (21); wherein in a vertical direction an upper surface of the reinforcement grid abuts the cover plate component (22).

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