Cylindrical battery pack

Abstract

The utility model relates to the technical field of cylindrical battery packs, in particular to a cylindrical battery pack, which comprises a box body, a plurality of mounting areas and a plurality of cylindrical battery packs, the battery assembly is arranged in the mounting area; the battery assembly is composed of a plurality of cylindrical batteries, and the axis direction of the cylindrical batteries is parallel to the bottom plate of the box body; the conducting bar is arranged on the side, away from the bottom plate, of the battery assembly, and the projection of the conducting bar coincides with the projection of the battery assembly in the direction perpendicular to the bottom plate. According to the embodiment, the conducting bar is arranged on one side, far away from the bottom plate, of the battery pack, so that transverse spaces on two sides of the box body can be reduced, and the occupied area of the battery pack is reduced. Furthermore, the conducting bar is arranged above the battery assembly, and when the side face of the battery pack is collided, impact force cannot directly affect the conducting bar, so that normal operation of the battery pack can still be guaranteed, and the situation that the vehicle loses power when the side face of the vehicle is collided is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a cylindrical battery pack. BACKGROUND

[0002] At present, in the battery pack of cylindrical battery, cylindrical battery is usually placed along the height direction of battery pack, that is, directly put cylindrical battery with built-in vertically into the battery pack. In this way, the conductive row is set along the inner edge of the battery pack box body, and is connected with the internal battery row after passing through the two sides of the battery pack box body. In this way, the conductive row can be conveniently heat dissipated, and the work of the battery row is not affected.

[0003] However, since the conductive row is arranged on the two sides of the battery pack box body, the battery pack box body needs to reserve a certain transverse space, so that the battery pack of this mode occupies a large area, and the conductive row is easily damaged when the side of the battery pack is collided, thereby causing the battery pack to be unable to normally operate. SUMMARY

[0004] Therefore, the utility model provides a cylindrical battery pack to solve the problems that the battery pack occupies a large area and the conductive row is easily damaged when the side of the battery pack is collided.

[0005] In a first aspect, the utility model provides a cylindrical battery pack, which comprises:

[0006] A box body is internally provided with a plurality of installation areas;

[0007] A battery assembly is arranged in the installation area; the battery assembly is composed of a plurality of cylindrical batteries, and the cylindrical batteries are horizontally placed in the installation area, so that the height direction of the cylindrical batteries is the same as the length direction or the width direction of the box body;

[0008] A conductive row is arranged above the battery assembly.

[0009] Advantages: the embodiment horizontally places the cylindrical batteries, and arranges the conductive row above the battery assembly, so that the transverse space of the two sides of the box body can be reduced, and the area occupied by the battery pack is reduced. Meanwhile, the conductive row is arranged on the side of the battery assembly away from the bottom plate, so the influence of the external environment is smaller than that of the arrangement on the two sides of the box body, so that no space is needed to install other reinforcing structures, and the longitudinal space of the battery pack is not affected. Further, the conductive row is arranged above the battery assembly, so that the impact force does not directly affect the conductive row when the side of the battery pack is collided, so that the battery pack can still normally operate, and the vehicle is not lost power when the side of the vehicle is collided. BRIEF DESCRIPTION OF DRAWINGS

[0010] 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.

[0011] Figure 1 This is a schematic diagram of the internal structure of the cylindrical battery pack in an embodiment of this utility model;

[0012] Figure 2 for Figure 1 A magnified view of part of D;

[0013] Figure 3 This is a schematic diagram of the structure of the fixed bracket in an embodiment of this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Box body;

[0016] 2. Installation area; 21. Support beam; 22. Fixing frame; 23. Fixing bracket; 231. Fixing seat; 232. Fixing ring;

[0017] 3. Battery assembly; 4. Conductor busbar; 5. Separator; 6. Liquid cooling plate. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "mounting", "connection" should be broad sense understanding, for example, it can be fixed connection, also can be detachable connection, or integrally connected;It can be mechanical connection, also can be electrical connection;It can be directly connected, also can be indirectly connected through intermediate medium, also can be the intercommunication of two elements, it can be wireless connection, also can be wired connection.For ordinary workers in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0021] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0022] At present, in the battery pack of cylindrical battery, cylindrical battery is usually placed along the height direction of battery pack, that is, cylindrical battery with built-in is directly placed vertically into the battery pack. In this way, the conductive row 4 is arranged along the inner edge of the battery pack box 1, and is connected with the internal battery row after passing through the two sides of the battery pack box 1. In this way, the conductive row 4 can be conveniently cooled, and the work of the battery row is not affected. However, since the conductive row 4 is arranged on the two sides of the battery pack box 1, the battery pack box 1 needs to reserve a certain transverse space, so that the battery pack of this kind occupies a large area, and the conductive row 4 is easily damaged when the side of the battery pack is collided, thereby causing the battery pack to be unable to work normally.

[0023] Therefore, the utility model provides a battery pack to solve the problems of large area occupied by the battery pack and easy damage of the conductive row 4 when the side of the battery pack is collided.

[0024] The embodiments of the utility model will be described below in combination with Figures 1 to 3 The embodiments of the utility model will be described below in combination with

[0025] According to the embodiments of the utility model, on the one hand, a cylindrical battery pack is provided, which comprises a box body 1, a battery assembly 3 and a conductive row 4.

[0026] Specifically, in the present embodiment, a plurality of mounting areas 2 are arranged in the box body 1, and the battery assembly 3 is arranged in the mounting area 2. The battery assembly 3 is arranged in each mounting area 2 respectively, so that the battery assembly 3 and the electrical components arranged in the mounting area 2 can be modularized, thereby facilitating the maintenance of technicians.

[0027] Further, in the present embodiment, the battery assembly 3 is composed of a plurality of cylindrical batteries, such as Figure 1 and Figure 2As shown, the axis direction of the cylindrical battery is parallel to the bottom plate of the box 1, that is, the cylindrical battery is horizontally placed in the mounting area 2.

[0028] Further, in the present embodiment, the conductive row 4 is arranged on the side of the battery assembly 3 away from the bottom plate, and the projection of the conductive row 4 in the direction perpendicular to the bottom plate coincides with the projection of the battery assembly 3. That is, the conductive row 4 is arranged on the top of the battery assembly 3 and coincides with the battery assembly 3 in the vertical direction.

[0029] In this way, the present embodiment horizontally places the cylindrical battery and arranges the conductive row 4 above the battery assembly 3, so as to reduce the lateral space on both sides of the box 1 and further reduce the floor area of the battery pack. Meanwhile, arranging the conductive row 4 on the side of the battery assembly 3 away from the bottom plate makes it less affected by the external environment than arranging it on both sides of the box 1, so that there is no need to reserve space for installing other reinforcing structures, which in turn does not affect the longitudinal space of the battery pack. Further, arranging the conductive row 4 above the battery assembly 3 makes the impact force not directly affect the conductive row 4 when the side of the battery pack is impacted, so as to still ensure that the battery pack can normally operate and avoid the situation that the vehicle loses power when it is impacted from the side.

[0030] Further, in an optional embodiment, the cylindrical battery pack further comprises a partition 5 arranged on the conductive row 4 and at least between the conductive row 4 and the battery assembly 3, so as to have a gap between the conductive row 4 and the battery assembly 3. Of course, in the present embodiment, the partition 5 can be directly arranged on both upper and lower end faces of the conductive row 4, or can be arranged only on the lower end face of the conductive row 4. The partition 5 can also be arranged in sections on both upper and lower end faces of the conductive row 4, or can be arranged only on the lower end face of the conductive row 4. Those skilled in the art can make changes according to actual conditions as long as the same technical effects can be achieved.

[0031] In this way, the present embodiment arranges the partition 5 to effectively isolate the conductive row 4 and the battery assembly 3, so as to avoid short circuit caused by accidental contact and improve the safety of the cylindrical battery pack. Moreover, the partition 5 can be made of insulating material, so as to further prevent current leakage and ensure electrical safety. Further, since there is a gap between the conductive row 4 and the battery assembly 3, the partition 5 can provide an additional air flow path to help the heat between the conductive row 4 and the battery assembly 3 to be better dissipated, so as to prevent local overheating. Meanwhile, the partition 5 can absorb part of the vibration and impact to protect the battery assembly 3 from physical damage. The partition 5 can also provide additional mechanical support to enhance the overall structural stability of the cylindrical battery pack.

[0032] Further, in an alternative embodiment, the battery assembly 3 is further tightly attached with a liquid cooling plate 6, the conductive strip 4 is located on the end face of the liquid cooling plate 6 away from the battery assembly 3, and the partition 5 is further arranged between the conductive strip 4 and the liquid cooling plate 6.

[0033] In this way, the partition 5 in the embodiment plays a role of isolation and insulation, ensuring that there is enough gap between the conductive strip 4 and the liquid cooling plate 6, so that the partition 5 can effectively prevent accidental contact between the conductive strip 4 and the liquid cooling plate 6, avoiding short circuit phenomenon. After the partition 5 is made of insulating material, the electrical safety can be further improved. Further, the partition 5 can provide an additional air flow path to help better dissipate heat between the conductive strip 4 and the liquid cooling plate 6.

[0034] Further, in an alternative embodiment, the cylindrical battery pack further comprises a box cover, which is fastened on the box body 1. The partition 5 is arranged on the end face of the conductive strip 4 close to the box cover. Of course, the partition 5 can also be directly applied to the inner end face of the box cover, so that the partition 5 can play a role of insulation and isolation while also providing a certain shock absorption effect for the whole cylindrical battery pack.

[0035] Further, in an alternative embodiment, the area covered by the partition 5 and the conductive strip 4 is A, the area of the conductive strip 4 is B, and the ratio A / B between A and B is between 0.04 and 0.05, the unit of area is mm 2 For example, it can be 0.04, 0.042, 0.044, 0.046, 0.048, 0.05, etc. The embodiment only exemplifies the specific value of the ratio, but does not limit it, and those skilled in the art can change it according to the actual situation, as long as the same technical effect can be achieved.

[0036] Further, in an alternative embodiment, in the extension direction of the conductive strip 4, the partition 5 is provided with a plurality of partitions 5, and a spacing distance C is provided between adjacent two partitions 5, and the value of the spacing distance C is between 30 mm and 180 mm. For example, it can be 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, etc. The embodiment only exemplifies the specific value of the ratio, but does not limit it, and those skilled in the art can change it according to the actual situation, as long as the same technical effect can be achieved.

[0037] In this way, each partition 5 in the embodiment plays a role of isolation and insulation, ensuring that the electrically conductive strip 4 has sufficient clearance with the liquid cooling plate 6 or the box cover. A plurality of partitions 5 can be uniformly distributed on the electrically conductive strip 4, ensuring that the entire electrically conductive strip 4 has sufficient isolation with the liquid cooling plate 6 or the box cover. At the same time, a plurality of partitions 5 can provide more support points, enhance the mechanical stability of the electrically conductive strip 4, and reduce vibration and displacement. Further, compared with the partitions 5 being laid on the electrically conductive strip 4 as a whole, the space left between two adjacent partitions 5 can provide an additional air flow path, helping the heat between the electrically conductive strip 4 and the liquid cooling plate 6 or the box cover to be better dissipated, improving the heat dissipation effect. At the same time, the spacing distance can reduce the total amount of partitions 5, thereby reducing the overall weight of the cylindrical battery pack.

[0038] Further, in an optional embodiment, the partition 5 is a foam. Of course, it can also be other materials that can play a role of insulation, buffering, and support. The embodiment only exemplifies the material of the partition 5, but is not limited thereto, and those skilled in the art can make changes according to actual conditions as long as the same technical effects can be achieved.

[0039] Further, in an optional embodiment, the mounting area 2 includes a support beam 21 and a fixed frame 22.

[0040] Specifically, a pair of support beams 21 are arranged in each mounting area 2, and the two ends of the support beam 21 are respectively connected to the two opposite side edges in the box 1. In this way, the mounting area 2 in a rectangular structure can be formed. At the same time, the two support beams 21 are arranged at intervals, so that the battery assembly 3 is adapted to be mounted between the two support beams 21. The fixed frame 22 is arranged on the end face of the support beam 21 close to the battery assembly 3. The inner side of the fixed frame 22 can be provided with a fixed groove suitable for embedding the battery assembly 3, and the fixed groove can further fix the battery assembly 3.

[0041] In this way, since the electrically conductive strip 4 in the embodiment is adjusted from the side edge of the box 1 to the top of the box 1, the structural strength of the side edge of the box 1 is reduced to a certain extent. Therefore, the support beam 21 and the fixed frame 22 in the embodiment can enhance the overall structural stability of the cylindrical battery pack to a certain extent, and improve the impact resistance and vibration resistance.

[0042] Further, in an optional embodiment, the mounting area 2 further includes a fixed bracket 23 arranged on the fixed frame 22, and the fixed bracket 23 is connected with the electrically conductive strip 4. The fixed bracket 23 is used to mount the electrically conductive strip 4.

[0043] Further, for the type of the fixed support 23, the conductive row 4 and the fixed support 23 can be fixedly connected or detachably connected. For the fixed connection, welding, bonding and the like can be adopted. For the detachable connection, screw holes can be adopted for fixing, buckles and slots can be adopted for fixing, and magnetic sheets can be adopted for fixing.

[0044] The detachable connection is exemplified below. For example, a fixed plate can be additionally arranged at the bottom of the fixed support 23, the number of the fixed plate can be changed by those skilled in the art according to actual conditions, 1, 2, 3, 4 or the like, screw holes are arranged on the fixed plate, another screw hole is arranged on the conductive row 4 corresponding to the screw hole, and then the screw is sequentially inserted through the screw hole on the fixed plate and the screw hole on the conductive row 4, so as to connect the fixed support 23 and the conductive row 4. Further, when the buckles and the slots are adopted for fixing, the buckles can be additionally arranged on the fixed support 23, the number of the buckles can be changed by those skilled in the art according to actual conditions, 1, 2, 3, 4 or the like, the slots capable of cooperating with the buckles are arranged on the conductive row 4 corresponding to the buckles, and then the buckles on the fixed support 23 are directly inserted into the slots on the conductive row 4, so as to connect the fixed support 23 and the conductive row 4. When the magnetic sheets are adopted for fixing, the magnetic sheets can be additionally arranged on the fixed support 23, the number of the magnetic sheets can be changed by those skilled in the art according to actual conditions, 1, 2, 3, 4 or the like, the magnetic sheets capable of being attracted to the magnetic sheets are arranged on the conductive row 4 corresponding to the magnetic sheets, and then the magnetic sheets on the fixed support 23 are directly inserted into the magnetic sheets on the conductive row 4, so as to magnetically connect the fixed support 23 and the conductive row 4.

[0045] Of course, the embodiment only exemplifies the fixed connection and the detachable connection, but is not limited thereto, and those skilled in the art can change it according to actual conditions, as long as the same technical effects can be achieved.

[0046] Further, in an optional embodiment, the fixed support 23 comprises a fixed seat 231 and a fixed ring 232.

[0047] Specifically, in the embodiment, the fixed seat 231 is arranged on the fixed frame 22, the fixed ring 232 is arranged on the top end face of the fixed seat 231, and the fixed ring 232 is detachably connected with the conductive row 4. The fixed ring 232 can be provided with a spring buckle, which is in a normally closed state, but under the extrusion of external force, the spring buckle is opened, so that the conductive row 4 is inserted into the fixed ring 232. After the external force disappears, the spring buckle will return to the normally closed state under the action of its own elastic force.

[0048] Of course, the embodiment only illustrates the opening mode of the fixing ring 232. For example, the fixing ring 232 can also be provided as an open structure, and a clamping groove corresponding to the open structure is arranged at a position of the fixing seat 231 corresponding to the opening. In actual use, the conductive bar 4 is first placed on the fixing seat 231, and then the fixing ring 232 is directly clamped into the clamping groove, so as to realize the fixation of the conductive bar 4.

[0049] The embodiment does not limit the opening mode of the fixing ring 232, and those skilled in the art can change it according to the actual situation, which can achieve the same technical effect.

[0050] In this way, the embodiment combines the fixing seat 231 and the fixing ring 232, so that the installation and maintenance of the conductive bar 4 are more convenient, and the installation time and cost are reduced. The detachable connection design enables technicians to quickly adjust the position of the conductive bar 4 as needed to adapt to different installation requirements. Moreover, the fixing ring 232 can ensure the stable connection of the conductive bar 4 on the fixing seat 231, reduce the loosening and displacement of the conductive bar 4, and improve the overall safety. Of course, the detachable connection design also makes it more convenient for technicians to check and maintain the conductive bar 4, which can be quickly disassembled for inspection and maintenance.

[0051] Although the embodiments of the utility model are described in combination with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the utility model, and such modifications and changes all fall within the scope defined by the appended claims.

Claims

1. A cylindrical battery pack, characterized by, The application relates to a cylindrical battery pack. The cylindrical battery pack comprises: a box (1) internally provided with a plurality of mounting areas (2); a battery assembly (3) arranged in the mounting area (2); the battery assembly (3) is composed of a plurality of cylindrical batteries, and the axial direction of the cylindrical batteries is parallel to the bottom plate of the box (1); 2. The cylindrical battery pack of claim 1, wherein, a conductive row (4) arranged on the side of the battery assembly (3) away from the bottom plate, and the projection of the conductive row (4) in the direction perpendicular to the bottom plate coincides with the projection of the battery assembly (3). The cylindrical battery pack further comprises:

3. The cylindrical battery pack of claim 2, wherein, a partition piece (5) arranged on the conductive row (4) and at least arranged between the conductive row (4) and the battery assembly (3), so that the conductive row (4) and the battery assembly (3) are spaced apart.

4. The cylindrical battery pack of claim 3, wherein, The battery assembly (3) is further tightly attached with a liquid cooling plate (6), the conductive row (4) is located on the end face of the liquid cooling plate (6) away from the battery assembly (3), and the partition piece (5) is further arranged between the conductive row (4) and the liquid cooling plate (6). The cylindrical battery pack further comprises:

5. The cylindrical battery pack according to any one of claims 2 to 4, characterized in that, a box cover buckled on the box (1); the partition piece (5) is arranged on the end face of the conductive row (4) close to the box cover.

6. The cylindrical battery pack according to any one of claims 2 to 4, characterized in that, The area covered by the partition piece (5) and the conductive row (4) is A, the area of the conductive row (4) is B, and the ratio A / B between A and B is between 0.04 and 0.

05.

7. The cylindrical battery pack according to any one of claims 2 to 4, characterized by, In the extension direction of the conductive row (4), a plurality of partition pieces (5) are arranged, and a spacing distance C is arranged between adjacent two partition pieces (5), and the value of the spacing distance C is between 30 mm and 180 mm.

8. The cylindrical battery pack according to any one of claims 1 to 4, characterized by, The partition piece (5) is a foam. The mounting area (2) comprises: a pair of support beams (21), the two ends of the support beam (21) are respectively connected with the two opposite side edges in the box (1); and the pair of support beams (21) are arranged at intervals, so that the battery assembly (3) is arranged between the two support beams (21); 9. The cylindrical battery pack of claim 8, wherein, a fixed frame (22) arranged on the end face of the support beam (21) close to the battery assembly (3). The mounting area (2) further comprises:

10. The cylindrical battery pack of claim 9, wherein, a fixed support (23) arranged on the fixed frame (22); the fixed support (23) is connected with the conductive row (4). The fixed support (23) comprises: a fixed seat (231) arranged on the fixed frame (22); a fixed ring (232) arranged on the top end face of the fixed seat (231); the fixed ring (232) is detachably connected with the conductive row (4).

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