Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack, which comprises a box body, a battery pack and a battery pack, an explosion-proof area is arranged on the battery assembly; and the cover plate mechanism is arranged on the battery assembly and covers the surface of the explosion-proof area, so that exhaust channels are formed between the cover plate mechanism and the surface of the explosion-proof area, the battery rows in the battery assembly extend in the same direction, and each exhaust channel corresponds to each battery row in a one-to-one manner. According to the embodiment, the exhaust channel is arranged in the cover plate mechanism, if the battery is abnormal, gas exhausted from the anti-explosion valve can be directly exhausted to the two sides of the battery pack through the exhaust channel, a chassis cannot be directly impacted, and the safety of an automobile is improved. Meanwhile, the exhaust passage can ensure that the gas can be normally exhausted, so that the phenomenon of battery explosion caused by the fact that the gas cannot be exhausted is avoided, and the safety performance of the battery is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack. Background Technology

[0002] Currently, batteries in electric vehicles are typically installed at the bottom of the chassis. Because of the relatively low ground clearance of car chassis, installing the battery at the bottom further reduces this clearance. The lower the ground clearance, the lower the chassis, and consequently, the worse the vehicle's off-road capability. Therefore, to minimize the battery's impact on ground clearance, the battery pack cover has been eliminated; instead, the chassis serves as the battery pack cover, meaning the top of the battery pack directly contacts the chassis.

[0003] However, this design directly shortens the distance between the explosion-proof valve on the battery and the chassis. In actual use, if the battery malfunctions, the gas discharged from the explosion-proof valve will directly impact the chassis, or the small distance between the explosion-proof valve and the chassis may prevent the gas from escaping properly, thus seriously affecting the battery's safety performance. Utility Model Content

[0004] In view of this, the present invention provides a battery pack to solve the problem that the gas discharged from the explosion-proof valve will directly impact the chassis, or that the gas cannot be discharged normally.

[0005] In a first aspect, this utility model provides a battery pack, which includes:

[0006] The housing has an internal cavity containing a battery assembly; the battery assembly has an explosion-proof zone.

[0007] A cover plate mechanism is disposed on the battery assembly and covers the surface of the explosion-proof area, so that an exhaust channel is formed between the cover plate mechanism and the surface of the explosion-proof area. The battery rows in the battery assembly extend in the same direction, and each exhaust channel corresponds to each battery row.

[0008] Beneficial Effects: In practical use, the battery pack is installed at the bottom of the car chassis, with the cover mechanism abutting against the chassis. Because this embodiment includes an exhaust channel within the cover mechanism, a predetermined space exists between the explosion-proof zone formed by the explosion-proof valve and the car chassis. If a battery malfunctions, the gas discharged from the explosion-proof valve will directly exit through the exhaust channel to both sides of the battery pack, preventing direct impact on the chassis and improving vehicle safety. Simultaneously, the exhaust channel ensures normal gas discharge, preventing battery explosions due to gas blockage, thus significantly enhancing battery safety. Furthermore, since the terminals on both sides of the battery assembly are higher than the explosion-proof valve, the exhaust channel occupies the space between the terminals, preventing the cover mechanism from occupying excessive space in the height direction and maintaining ground clearance within the normal range. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present utility model;

[0011] Figure 2 for Figure 1 A schematic diagram of the internal structure of the battery pack after the cover mechanism is lifted by the lieutenant general;

[0012] Figure 3 for Figure 2 Enlarged schematic diagram of the central support component;

[0013] Figure 4 This is a cross-sectional view of the inside of the battery pack when the support component and the explosion-proof zone are misaligned in an embodiment of this utility model.

[0014] Figure 5 This is a cross-sectional view of the inside of the battery pack when the support component and the explosion-proof area are directly opposite each other in an embodiment of this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Housing; 11. Battery assembly; 111. Explosion-proof area; 112. Terminal post;

[0017] 2. Cover plate mechanism;

[0018] 21. Support component; 211. Support leg; 2111. Horizontal part; 2112. Vertical part; 212. Support plate; 213. Support rib; 214. Foam;

[0019] 22. Cover plate assembly; 221. Adhesive layer; 222. Mica board;

[0020] 23. Exhaust passage. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] Currently, batteries in electric vehicles are typically installed at the bottom of the chassis. Because of the low ground clearance of car chassis, installing the battery at the bottom further reduces this clearance. The lower the ground clearance, the lower the chassis, and consequently, the worse the vehicle's off-road capability. Therefore, to minimize the battery's impact on ground clearance, the battery pack cover has been eliminated, and the chassis itself serves as the cover, directly abutting the top of the battery pack against the chassis. However, this design directly shortens the distance between the battery's explosion-proof valve and the chassis. In actual use, if a battery malfunctions, the gas vented from the explosion-proof valve may directly impact the chassis, or the small distance between the valve and the chassis may prevent proper gas venting, severely impacting battery safety.

[0026] In view of this, the present invention provides a battery pack to solve the problem that the gas discharged from the explosion-proof valve will directly impact the chassis, or that the gas cannot be discharged normally.

[0027] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0028] According to an embodiment of the present invention, a battery pack is provided, which includes a housing 1 and a cover mechanism 2.

[0029] Specifically, in this embodiment, the housing 1 has an internal receiving cavity, within which a battery assembly 11 is disposed. The battery assembly 11 is composed of multiple battery bars, and an explosion-proof zone 111 is provided on the battery assembly 11. Figure 2 As shown, each battery is equipped with an explosion-proof valve. When the batteries are arranged together to form a battery pack, the area formed by all the explosion-proof valves on the battery pack constitutes the explosion-proof zone 111. Therefore, the extension direction of the explosion-proof zone 111 is the same as the extension direction of the battery pack.

[0030] Furthermore, in this embodiment, the cover plate mechanism 2 is disposed on the battery assembly 11 and covers the surface of the explosion-proof area 111, forming an exhaust channel 23 between the cover plate mechanism 2 and the surface of the explosion-proof area 111. The exhaust channel 23 extends in the same direction as the explosion-proof area 111, and also in the same direction as the battery pack in the battery assembly 11. Furthermore, the exhaust channel 23 corresponds one-to-one with the battery pack on the battery assembly 11, and similarly, one-to-one with the explosion-proof area 111. In practical applications, the exhaust channel 23 can extend directly to both sides of the battery assembly 11 or the housing 1. In this way, if a battery malfunctions, the gas discharged from the explosion-proof valve will directly pass through the exhaust channel 23 to both sides of the battery pack, without directly impacting the chassis.

[0031] With this configuration, in actual use, the battery pack is installed at the bottom of the car chassis, and the cover mechanism 2 abuts against the car chassis. Because this embodiment includes an exhaust channel 23 within the cover mechanism 2, a predetermined space exists between the explosion-proof zone 111 formed by the explosion-proof valve and the car chassis. If the battery malfunctions, the gas discharged from the explosion-proof valve will directly exit through the exhaust channel 23 to both sides of the battery pack, preventing direct impact on the chassis and improving vehicle safety. Simultaneously, the exhaust channel 23 ensures normal gas discharge, preventing battery explosion due to gas blockage, thus significantly enhancing battery safety. Furthermore, since the terminals 112 on both sides of the battery assembly 11 are higher than the explosion-proof valve, the exhaust channel 23 occupies the space between the terminals 112, preventing the cover mechanism 2 from occupying excessive space in the height direction and maintaining a normal ground clearance.

[0032] Furthermore, in an optional embodiment, the cover plate mechanism 2 includes a support assembly 21 and a cover plate assembly 22.

[0033] Specifically, in this embodiment, multiple support components 21 are disposed on the battery assembly 11, and each support component 21 has an exhaust channel 23 inside. The support component 21 extends in the same direction as the explosion-proof zone 111. That is, the support component 21 and the explosion-proof zone 111 are arranged facing each other, so that the exhaust channel 23 and the explosion-proof zone 111 are arranged facing each other.

[0034] Furthermore, the cover assembly 22 covers the housing 1, and the cover assembly 22 abuts against the support assembly 21.

[0035] With this configuration, in this embodiment, an exhaust channel 23 is directly provided inside the support component 21, so that the support component 21 and the explosion-proof valve are directly opposite each other. In this way, while the support component 21 has the function of exhausting, it can also further improve the overall structural strength of the cover plate mechanism 2, ensuring that the battery component 11 can exhaust normally.

[0036] Furthermore, in another alternative embodiment, the cover plate mechanism 2 includes a support assembly 21 and a cover plate assembly 22.

[0037] Specifically, in this embodiment, multiple support components 21 are disposed on the battery assembly 11, each support component 21 being located between two adjacent explosion-proof zones 111, and the support component 21 extending in the same direction as the explosion-proof zone 111. Vertically, the top end face of the support component 21 is higher than the terminal post 112 of the battery assembly 11. Furthermore, a cover plate assembly 22 covers the housing 1, and two adjacent support components 21 and the cover plate assembly 22 together form an exhaust channel 23.

[0038] In other words, the support component 21 is offset from the explosion-proof zone 111, so that the support component 21 becomes the side wall of the exhaust channel 23, which provides a certain support for the cover plate component 22.

[0039] In this embodiment, by surrounding the cover assembly 22 and the support assembly 21 to form the exhaust channel 23, the support assembly 21 is misaligned with the explosion-proof valve. This allows for an appropriate expansion of the space in the exhaust channel 23, further increasing the exhaust flow of the battery assembly 11 and preventing the battery pack from exploding due to high air pressure during exhaust.

[0040] Furthermore, in an optional embodiment, the support assembly 21 includes a support foot 211 and a support plate 212.

[0041] Specifically, in this embodiment, a pair of support legs 211 are arranged side by side on the battery assembly 11, and the support legs 211 extend in the same direction as the explosion-proof zone 111, with the top end face of the support legs 211 higher than the terminal post 112 of the battery assembly 11. Further, a support plate 212 covers the pair of support legs 211, such that the support plate 212 and the pair of support legs 211 surround and form the exhaust channel 23. Of course, by directly forming the exhaust channel 23 inside the support assembly 21, when the support assembly 21 and the explosion-proof zone 111 are misaligned, the support assembly 21 can serve as support and act as the sidewall of the exhaust channel 23. When the support assembly 21 and the explosion-proof zone 111 are directly opposite each other, the support assembly 21 can directly function as the exhaust channel 23, thereby improving the versatility of the support assembly 21.

[0042] With this configuration, in this embodiment, the support foot 211 extends in the same direction as the explosion-proof zone 111, making the direction of the support foot 211 consistent with the direction of the explosion-proof zone 111. The support foot 211 provides comprehensive support for the entire battery pack while also helping to guide the discharge of gas or heat. Simultaneously, by positioning the top surface of the support foot 211 higher than the terminal post 112 of the battery assembly 11, it prevents gas or liquid generated during venting from the battery assembly 11 from splashing onto the terminal post 112. This creates a closed space around the terminal post 112, preventing short circuits or other electrical faults, thereby further improving battery safety.

[0043] Furthermore, in an optional embodiment, the support foot 211 includes a horizontal portion 2111 and a vertical portion 2112.

[0044] Specifically, in this embodiment, a horizontal portion 2111 is disposed on the battery assembly 11, and the horizontal portion 2111 extends in the same direction as the explosion-proof zone 111. A vertical portion 2112 is disposed on the horizontal portion 2111, and the vertical portion 2112 extends in the same direction as the explosion-proof zone 111, and the top of the vertical portion 2112 is covered by the support plate 212.

[0045] In this way, the horizontal part 2111 serves as the base for the support foot 211, used to stably mount the support foot 211 onto the battery assembly 11, while the vertical part 2112 can act as the sidewall of the exhaust channel 23. Furthermore, regarding the mounting method between the horizontal part 2111 and the battery assembly 11, the horizontal part 2111 and the battery assembly 11 can be fixedly connected or detachably connected. For a fixed connection, welding, bonding, or other methods can be used. For a detachable connection, screws and screw holes, clips and slots, or magnetic attraction can be used for fixation.

[0046] The following provides examples of detachable connection methods. For instance, a fixing plate can be additionally provided on the battery assembly 11. Those skilled in the art can change the number of fixing plates according to actual needs, such as 1, 2, 3, 4, etc. Screw holes are then made on the fixing plates, and another screw hole is made on the horizontal part 2111 at the corresponding screw hole position. Screws are then passed through the screw holes on the fixing plate and the screw holes on the horizontal part 2111 in sequence to connect the battery assembly 11 to the horizontal part 2111. Furthermore, when using a snap-fit ​​and slot method for fixing, a snap-fit ​​can be additionally provided on the battery assembly 11. Those skilled in the art can change the number of snap-fits according to actual needs, such as 1, 2, 3, 4, etc. Slots that can cooperate with the snap-fit ​​are then made on the horizontal part 2111 at the corresponding snap-fit ​​positions. The snap-fit ​​on the battery assembly 11 is then directly inserted into the slots on the horizontal part 2111 to connect the battery assembly 11 to the horizontal part 2111. When fixing by magnetic attraction, a magnetic sheet can be additionally provided on the battery assembly 11. Those skilled in the art can change the number of magnetic sheets according to the actual situation, such as 1, 2, 3, 4, etc. Then, a magnetic sheet of the opposite shape that can attract the magnetic sheet is made on the horizontal part 2111 at the position corresponding to the magnetic sheet. Then, the magnetic sheet on the battery assembly 11 is directly aligned with the magnetic sheet of the opposite shape embedded in the horizontal part 2111, thereby magnetically connecting the battery assembly 11 and the horizontal part 2111.

[0047] Of course, this embodiment is merely an example of fixed connection and detachable connection, but it does not limit the scope of the invention. Those skilled in the art can make changes according to the actual situation to achieve the same technical effect.

[0048] Furthermore, in an optional embodiment, the horizontal portion 2111 is parallel to the support plate 212, so that the support assembly 21 has an "I" shaped structure.

[0049] In this embodiment, the combination of the horizontal portion 2111 and the vertical portion 2112 forms a robust frame, enhancing the overall structural rigidity and reducing deformation under external impact. This structure can evenly distribute the load, ensuring the battery assembly 11 remains stable under various operating conditions. Furthermore, the horizontal portion 2111 and the vertical portion 2112 extend in the same direction as the explosion-proof zone 111, ensuring that gas or heat can be smoothly discharged along a predetermined path, reducing the risk of internal pressure buildup. The layout of the horizontal portion 2111 and the vertical portion 2112 also optimizes the width of the exhaust channel 23, ensuring sufficient space for gas or heat to flow. Simultaneously, when the horizontal portion 2111 and the vertical portion 2112 are made of a thermally conductive material such as metal, they can effectively conduct heat, helping the battery assembly 11 dissipate heat and extending battery life.

[0050] Furthermore, in an optional embodiment, the support component 21 further includes a plurality of support ribs 213, which are spaced apart on the end face of the support plate 212 near the battery component 11, and the plurality of support ribs 213 extend in the same direction as the explosion-proof zone 111.

[0051] In this embodiment, the support ribs 213 significantly improve the compressive strength of the support plate 212, preventing deformation or breakage under external pressure. Furthermore, the arrangement of multiple support ribs 213 increases the rigidity of the support plate 212, making it more robust and better able to withstand other external forces applied to the battery pack. Similarly, when the support ribs 213 are made of thermally conductive materials such as metal, they can serve as heat conduction paths, helping the heat from the battery assembly 11 to be transferred to the support plate 212 more quickly, and then dissipated through the support plate 212, improving the overall heat dissipation effect.

[0052] Furthermore, in an optional embodiment, the support assembly 21 further includes a plurality of foams 214, which are laid on the end face of the support plate 212 near the battery assembly 11, and a plurality of support ribs 213 divide the support plate 212 into a plurality of mounting areas, each mounting area being provided with the foams 214.

[0053] With this configuration, in this embodiment, the foam 214 possesses excellent energy absorption characteristics, capable of absorbing and dispersing vibrations and impacts experienced by the battery assembly 11 during transportation and use, protecting the battery assembly 11 from damage. Furthermore, the foam 214 can reduce vibration noise generated by the battery assembly 11 during operation, improving the user experience. Moreover, the foam 214 can prevent leakage of electrolyte or other liquids inside the battery, reducing damage to other parts of the battery assembly 11.

[0054] Of course, foam 214 can be replaced with other materials that have the same function. This embodiment is just an example, but it is not a limitation. Those skilled in the art can make changes according to the actual situation, as long as the same technical effect can be achieved.

[0055] Further, in an optional embodiment, the cover plate assembly 22 includes an adhesive layer 221 and a mica plate 222. Specifically, in this embodiment, the adhesive layer 221 is bonded to the top end face of the support assembly 21 in the vertical direction. The mica plate 222 covers the end face of the adhesive layer 221 away from the support assembly 21 and is bonded to the adhesive layer 221.

[0056] In this embodiment, a mica plate 222 is provided. Since mica plate 222 is an excellent electrical insulating material with high voltage and high temperature resistance, it can effectively prevent electrical short circuits inside the battery assembly 11, improving safety. Simultaneously, the covering of the mica plate 222 increases the rigidity of the cover assembly 22, reducing deformation under external forces and improving the overall structural stability. Furthermore, the adhesive layer 221 ensures a firm bond between the mica plate 222 and the support assembly 21, preventing the mica plate 222 from detaching during use and guaranteeing long-term insulation. Further, the adhesive layer 221 ensures the bonding strength between the mica plate 222 and the support assembly 21, improving the overall mechanical strength of the cover assembly 22, enabling it to withstand external pressure and impact.

[0057] Furthermore, in an optional embodiment, the cover plate mechanism 2 further includes a reinforcing grille disposed on the battery assembly 11 and located between two adjacent support assemblies 21. Vertically, the top of the reinforcing grille abuts against the cover plate assembly 22. The reinforcing grille has perforations, thus not affecting the outward exhaust of the exhaust channel 23.

[0058] In this embodiment, a reinforcing grille is incorporated. Since the grille is vertically aligned, it effectively supports the cover assembly 22, preventing deformation or damage under external pressure. Furthermore, because the grille is located between adjacent support assemblies 21, it provides additional lateral support, enhancing the overall structural strength of the battery assembly 11 and reducing deformation under lateral forces. Therefore, the presence of the reinforcing grille significantly improves the overall rigidity of the battery assembly 11, making it more stable and reducing damage caused by vibration or impact during transportation and use. Moreover, when the reinforcing grille is made of a thermally conductive material such as metal, it serves as a heat conduction path, helping the heat from the battery assembly 11 to be transferred to the cover assembly 22 more quickly, and then dissipated through the cover assembly 22, improving overall heat dissipation.

[0059] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: The housing (1) has an internal cavity containing a battery assembly (11); the battery assembly (11) has an explosion-proof zone (111). A cover plate mechanism (2) is disposed on the battery assembly (11) and covers the surface of the explosion-proof area (111), so that an exhaust channel (23) is formed between the cover plate mechanism (2) and the surface of the explosion-proof area (111). The exhaust channel (23) extends in the same direction as the battery pack in the battery assembly (11), and each exhaust channel (23) corresponds to each battery pack.

2. The battery pack according to claim 1, characterized in that, The cover plate mechanism (2) includes: Multiple support components (21) are disposed on the battery assembly (11); the support components (21) are provided with exhaust channels (23) inside, and the support components (21) extend in the same direction as the explosion-proof zone (111); A cover assembly (22) covers the housing (1); and the cover assembly (22) abuts against the support assembly (21).

3. The battery pack according to claim 1, characterized in that, The cover plate mechanism (2) includes: Multiple support components (21) are disposed on the battery assembly (11), each support component (21) being located between two adjacent explosion-proof zones (111), and the support component (21) extending in the same direction as the explosion-proof zone (111); in the vertical direction, the top end face of the support component (21) is higher than the terminal post (112) of the battery assembly (11); A cover assembly (22) covers the housing (1); two adjacent support assemblies (21) surround the cover assembly (22) to form an exhaust channel (23).

4. The battery pack according to claim 2 or 3, characterized in that, The support component (21) includes: A pair of support feet (211) are arranged side by side on the battery assembly (11), and the support feet (211) extend in the same direction as the explosion-proof area (111); A support plate (212) covers a pair of support feet (211); the support plate (212) and the pair of support feet (211) surround to form the exhaust channel (23); the top end face of the support plate (212) is higher than the terminal post (112) of the battery assembly (11).

5. The battery pack according to claim 4, characterized in that, The support leg (211) includes: A horizontal portion (2111) is disposed on the battery assembly (11), and the horizontal portion (2111) extends in the same direction as the explosion-proof area (111); A vertical part (2112) is provided on the horizontal part (2111), and the vertical part (2112) extends in the same direction as the explosion-proof zone (111); The top of the vertical part (2112) is covered by the support plate (212).

6. The battery pack according to claim 5, characterized in that, The horizontal part (2111) is parallel to the support plate (212), so that the support assembly (21) has an "I" shaped structure.

7. The battery pack according to claim 5 or 6, characterized in that, The support component (21) also includes: Multiple support ribs (213) are spaced apart on the end face of the support plate (212) near the battery assembly (11); the multiple support ribs (213) extend in the same direction as the explosion-proof area (111).

8. The battery pack according to claim 7, characterized in that, The support component (21) also includes: Multiple foams (214) are laid on the end face of the support plate (212) near the battery assembly (11); and multiple support ribs (213) divide the support plate (212) into multiple installation areas, each installation area being provided with the foams (214).

9. The battery pack according to claim 2 or 3, characterized in that, The cover plate assembly (22) includes: An adhesive layer (221) is bonded to the top end face of the support assembly (21) in the vertical direction; A mica plate (222) is placed over the end face of the adhesive layer (221) away from the support assembly (21) and is bonded to the adhesive layer (221).

10. The battery pack according to claim 2 or 3, characterized in that, The cover plate mechanism (2) also includes: A reinforcing grille is disposed on the battery assembly (11) and located between two adjacent support assemblies (21); the top of the reinforcing grille abuts against the cover assembly (22) in the vertical direction.

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