Battery pack with high safety performance

Abstract

This invention belongs to the technical field of battery packs, specifically relating to a battery pack with high safety performance. This high-safety battery pack includes: a PCM board, clamping covers on both sides of the PCM board, and a main control board on the upper side of the PCM board; the PCM board has several circular grooves for placing batteries, with battery bodies placed within the grooves; the PCM board has a current-guiding strip device for connecting the battery bodies, the current-guiding strip device including a current-guiding strip body, several positive electrode welding pieces on one side of the current-guiding strip body, and several negative electrode welding positions on the current-guiding strip body, the negative electrode welding positions being located on the side of the current-guiding strip body away from the negative electrode welding positions; the positive electrode welding pieces and negative electrode welding positions are staggered, and the current-guiding strip body has an angled safety opening strip located between the positive electrode welding pieces and the negative electrode welding positions. This high-safety battery pack can protect individual batteries, reduce damage to the entire battery pack, and improve the safety of the battery pack.

Description

Technical Field

[0001] This invention belongs to the technical field of battery packs, and specifically relates to a battery pack with high safety performance. Background Technology

[0002] Battery packs can be connected in series or in parallel. Parallel battery packs require each battery to have the same voltage, and the output voltage is equal to the voltage of one battery. Parallel battery packs can provide a stronger current. Series battery packs have fewer requirements.

[0003] In the prior art, a safety protection device for a modular green battery pack, with publication number CN214753991U, includes a safety box and a protective component. The safety box provides protection for the protective component, and a modular battery pack is installed inside the protective component. The protective component includes an electrostatic conduction component, an energy dissipation component, and a cooling component. One end of the electrostatic conduction component is connected to the outer wall of the battery pack, and the other end is connected to the ground. The energy dissipation component covers the outside of the battery pack, and the safety box covers the outside of the energy dissipation component. A cooling cavity is formed between the energy dissipation component and the inner wall of the safety box. The cooling component is connected to the cooling cavity.

[0004] While the existing technical solutions described above can provide protection for the protective components by using a safety box and encasing the protective components on the modular battery pack, thus achieving the goal of protecting the modular battery pack in the event of an accidental explosion and reducing the degree of damage, they can only provide external protection if the entire battery pack is damaged. They cannot protect individual batteries. If an individual battery has leakage or other problems, the temperature will rise sharply, which may cause other batteries to explode and be damaged. Summary of the Invention

[0005] The purpose of this invention is to provide a battery pack with high safety performance to solve the technical problem that problems in a single battery can cause problems in other batteries, thereby protecting each individual battery, reducing damage to the entire battery pack, and improving the safety of the battery pack.

[0006] To address the aforementioned technical problems, this invention provides a battery pack with high safety performance, comprising:

[0007] PCM board, clamping cover plates on both sides of the PCM board, and main control board on the upper side of the PCM board;

[0008] The PCM board has several circular slots for placing batteries, and the battery body is placed in the circular slots.

[0009] The PCM board is provided with a current guide strip device for connecting the battery body. The current guide strip device includes a current guide strip body, a plurality of positive electrode welding pieces on one side of the current guide strip body, and a plurality of negative electrode welding positions provided on the current guide strip body. The negative electrode welding positions are located on the side of the current guide strip body away from the negative electrode welding positions.

[0010] The positive electrode welding piece and the negative electrode welding position are placed in a staggered manner, and the guide strip body is provided with an oblique safety opening strip, which is located between the positive electrode welding piece and the negative electrode welding position;

[0011] A positive electrode safety assembly is provided between the positive electrode welding piece and the flow guide strip body. The positive electrode safety assembly includes a pair of positive electrode safety strips extending from the positive electrode welding piece, and the positive electrode safety is connected to the flow guide strip body.

[0012] Furthermore, the guide strip body is connected to the first and last guide strips, and the first and last guide strips are provided with first and last safety openings.

[0013] Furthermore, the negative electrode welding position is a T-shaped gap, and the gap of the negative electrode welding position is connected to the side of the guide strip body.

[0014] Furthermore, the clamping cover is made of metal.

[0015] Furthermore, the clamping cover plate has a recessed shallow groove on the side near the PCM board, a heat sink plate is embedded in the shallow groove, and a plurality of contact heat sink blocks are raised on the heat sink plate, the contact heat sink blocks are in contact with the guide strip body.

[0016] Furthermore, the circular grooves are arranged in an array, with one column of circular grooves and an adjacent column of circular grooves being staggered.

[0017] The beneficial effects of this invention are:

[0018] 1. By using the angled safety opening strip, the area of ​​the current-carrying strip body can be reduced. This means that when there is a problem with the negative electrode battery and there is a large current, the current cannot pass through the angled safety opening strip. Instead, it can only pass through the narrower part of the current-carrying strip body located at the angled safety opening strip. When the current is large, the temperature of the current-carrying strip rises rapidly, causing it to melt at the narrower part of the angled safety opening strip, thus playing a safety role.

[0019] 2. By using a PCM board made of PCM material and battery slots opened on the PCM board, when a single battery generates heat, the heat is not easily transferred to surrounding batteries through the board, thus allowing other batteries to function normally.

[0020] 3. By using the positive electrode fuse strip, when a problem occurs in the positive electrode battery, the current released by the positive electrode battery increases, which causes the temperature on the positive electrode fuse strip to rise, causing the positive electrode fuse strip to melt and thus improving the safety of the battery pack.

[0021] 4. By using the fuse openings at the beginning and end, the current flow area of ​​the current guide strips at the beginning and end can be reduced. In the event of leakage or other problems in the battery pack, the safety of the battery pack can be improved by melting the current guide strips at the beginning and end.

[0022] 5. The metal clamping cover allows for better heat dissipation from the battery, reducing heat buildup caused by battery damage.

[0023] 6. The heat dissipation capacity of the battery pack can be further improved by the contact heat dissipation block that is attached to the body of the air guide strip.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the battery pack with high safety performance according to the present invention;

[0027] Figure 2 This is a schematic diagram of the PCM board of the battery pack with high safety performance according to the present invention;

[0028] Figure 3 This is a structural block diagram of the clamping cover plate of the present invention;

[0029] Figure 4 This is a schematic diagram of the flow guide strip device of the present invention.

[0030] In the picture:

[0031] 1. PCM board; 11. Main control board; 12. Circular groove; 13. Battery body;

[0032] 2. Clamping cover plate; 21. Embedded in shallow groove; 22. Heat sink plate; 23. Contacting heat sink block;

[0033] 3. Guide bar device; 31. Guide bar body; 32. Positive electrode welding piece; 33. Negative electrode welding position; 34. Angled safety opening bar;

[0034] 4. Positive electrode fuse assembly; 41. Positive electrode fuse strip;

[0035] 5. Head and tail guide strips; 51. Head and tail safety openings. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example:

[0038] like Figures 1 to 4 As shown, a battery pack with high safety performance includes: a PCM plate 1, clamping cover plates 2 on both sides of the PCM plate 1, and a main control board 11 on the upper side of the PCM plate 1. The PCM plate 1 has several circular grooves 12 for placing batteries, and battery bodies 13 are placed in the grooves 12. The PCM plate 1 is provided with a current-guiding strip device 3 for connecting the battery bodies 13. The current-guiding strip device 3 is electrically connected to the main control board 11 to control all the battery bodies 13 embedded in the PCM plate 1. Since the PCM plate 1 is made of PCM material, when a single battery body 13 experiences leakage or other problems, the PCM plate 1 can absorb the heat from the problematic battery body 13, reducing the likelihood of a single problematic battery body 13 causing problems in other battery bodies 13, thereby providing initial protection for the battery pack.

[0039] In this embodiment, the clamping cover 2 is made of metal, so that the excessive heat on the battery body 13 can be initially dissipated through the clamping cover 2.

[0040] like Figure 2 and Figure 3 As shown, the clamping cover plate 2 has a recessed shallow groove 21 on the side near the PCM plate 1. A heat sink 22 is embedded in the shallow groove 21. Several contact heat sink blocks 23 are raised on the heat sink 22. The contact heat sink blocks 23 are attached to the guide strip body 31. Through the contact heat sink blocks 23 attached to the guide strip body 31, the heat dissipation capacity of the battery pack can be further improved, forming secondary heat dissipation.

[0041] like Figure 4As shown, the guide bar device 3 includes a guide bar body 31, a plurality of positive electrode welding pieces 32 on one side of the guide bar body 31, and a plurality of negative electrode welding positions 33 disposed on the guide bar body 31. The negative electrode welding positions 33 are located on the side of the guide bar body 31 away from the negative electrode welding positions 33. The positive electrode welding pieces 32 and the negative electrode welding positions 33 are staggered. The guide bar body 31 has an oblique safety opening strip 34, which is located between the positive electrode welding pieces 32 and the negative electrode welding positions 33.

[0042] In this embodiment, the negative electrode welding position 33 is a T-shaped gap. The gap of the negative electrode welding position 33 is connected to the side of the guide strip body 31. Through the T-shaped gap, it is convenient for the staff to weld the negative electrode battery to the guide strip body 31 at the negative electrode welding position 33.

[0043] like Figure 4 As shown, a positive electrode safety assembly 4 is provided between the positive electrode welding piece 32 and the current guide strip body 31. The positive electrode safety assembly 4 includes a pair of positive electrode safety thin strips 41 extending from the positive electrode welding piece 32. The positive electrode safety is connected to the current guide strip body 31. When a problem occurs in the positive electrode battery, the current released by the positive electrode battery increases, thereby causing the temperature on the positive electrode safety thin strip 41 to rise, causing the positive electrode safety thin strip 41 to melt and thus improving the safety of the battery pack.

[0044] like Figure 4 As shown, the guide strip body 31 is connected to the first and last guide strips 5 at both ends. The first and last guide strips 5 are provided with first and last safety openings 51. Through the first and last safety openings 51, the current flow area of ​​the first and last guide strips 5 can be reduced, thereby improving the safety of the battery pack by melting the first and last guide strips 5 when the battery pack has leakage or other problems.

[0045] In summary, the angled safety opening strip 34 reduces the current-carrying area of ​​the current-conducting strip body 31. This prevents the current from passing through the angled safety opening strip 34 when a problem occurs with the negative electrode battery, forcing it to pass through the narrower section of the current-conducting strip body 31 located within the angled safety opening strip 34. The high current causes a rapid temperature rise in the current-conducting strip, leading to melting at the narrower section of the angled safety opening strip 34, thus providing a safety function. The PCM board 1 and the battery slots on it prevent heat transfer from a single battery to surrounding batteries, allowing other batteries to function normally. The positive electrode safety strip 41, when a problem occurs with the positive electrode battery, increases the current discharged from the positive electrode battery, causing the temperature of the positive electrode safety strip 41 to rise and melt, thereby improving the safety of the battery pack. By using the safety openings 51 at both ends, the current flow area of ​​the head and tail guide strips 5 can be reduced, thereby improving the safety of the battery pack by melting the head and tail guide strips 5 in case of leakage or other problems. The metal clamping cover 2 allows for better heat dissipation from the battery, reducing heat buildup due to battery damage. The contact heat dissipation block 23, which is attached to the guide strip body 31, further enhances the heat dissipation capacity of the battery pack. All components selected in this application are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0046] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A battery pack with high safety performance, characterized in that, include: PCM board (1), clamping cover plates (2) on both sides of PCM board (1) and main control board (11) on the upper side of PCM board (1); The PCM board (1) has several circular grooves (12) and a battery body (13) is placed in the circular grooves (12); The PCM board (1) is provided with a guide bar device (3) for connecting the battery body (13). The guide bar device (3) includes a guide bar body (31), a plurality of positive electrode welding pieces (32) on one side of the guide bar body (31), and a plurality of negative electrode welding positions (33) provided on the guide bar body (31). The negative electrode welding positions (33) are located on the side of the guide bar body (31) away from the positive electrode welding pieces (32). The positive electrode welding piece (32) and the negative electrode welding position (33) are placed in a staggered manner. The guide strip body (31) is provided with an oblique safety opening strip (34), which is located between the positive electrode welding piece (32) and the negative electrode welding position (33). A positive electrode safety assembly (4) is provided between the positive electrode welding piece (32) and the guide strip body (31). The positive electrode safety assembly (4) includes a pair of positive electrode safety strips (41) extending from the positive electrode welding piece (32). The positive electrode safety strips (41) are connected to the guide strip body (31). The guide strip body (31) is connected to the first and last guide strips (5) at both ends, and the first and last guide strips (5) are provided with first and last safety openings (51); The negative electrode welding position (33) is a T-shaped gap, and the gap of the negative electrode welding position (33) is connected to the side of the guide strip body (31); The circular grooves (12) are arranged in an array, with one column of circular grooves (12) and the adjacent column of circular grooves (12) being staggered.

2. A battery pack with high safety performance as described in claim 1, characterized in that, The clamping cover plate (2) is made of metal.

3. A battery pack with high safety performance as described in claim 2, characterized in that, The clamping cover plate (2) has a recessed shallow groove (21) on the side near the PCM plate (1), and a heat sink plate (22) is embedded in the shallow groove (21). The heat sink plate (22) has a plurality of contact heat sink blocks (23) protruding on it, and the contact heat sink blocks (23) are attached to the guide strip body (31).

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