An explosion-proof power battery pack with easy heat dissipation

Abstract

The present invention discloses an explosion-proof power battery pack that is easy to dissipate heat, which belongs to the technical field of new energy batteries, and includes a plurality of batteries connected in series, wherein the size and structure of the plurality of batteries connected in series are the same, the plurality of batteries are arranged at equal intervals, and two adjacent batteries are connected in series through a connecting row; the connecting row includes a connecting portion and two connecting terminals vertically arranged at the end of the connecting portion, the two connecting terminals are respectively connected to the electrode connecting ports of the two adjacent batteries, and the connecting portion is located in the interval between the two adjacent batteries; a phase change material is pasted on the bottom side wall of each battery in the battery pack. In the present invention, the phase change material can absorb the heat released by the battery, and at the same time, the connecting row and the phase change material are located in the gap between the two adjacent batteries in the battery pack, forming a heat dissipation channel, and the heat generated by the battery discharge can be promptly diffused to the outside of the battery pack, so that the heat dissipation performance of the battery pack is good, which greatly reduces the risk of explosion caused by overheating of the battery pack.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy batteries, and in particular relates to an explosion-proof power battery pack that is easy to dissipate heat. Background Art

[0002] New energy batteries can be mainly divided into storage batteries and fuel cells, and storage batteries are currently the most commonly used new energy batteries. Common storage batteries include lead-acid batteries, lithium batteries, etc. The power of a single storage battery is limited. When a storage battery is needed to act as a power battery, multiple batteries need to be connected in series or parallel to provide greater power.

[0003] When multiple batteries are connected in series or in parallel to form a battery pack, they will dissipate a lot of heat during the discharge process. Traditional battery packs do not take heat dissipation measures, resulting in the inability to dissipate the heat. At the same time, the connection wires between the batteries in traditional battery packs are arranged in a chaotic manner, and the heat between the battery connection wires is difficult to dissipate, which can easily cause the battery pack to overheat and even cause the battery pack to explode, affecting the safety of battery use. Summary of the invention

[0004] The object of the present invention is to provide an explosion-proof power battery pack that is easy to dissipate heat, so as to solve the technical problems mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention discloses an explosion-proof power battery pack that is easy to dissipate heat, including a plurality of batteries connected in series, wherein the size and structure of the plurality of batteries connected in series are the same, the plurality of batteries are arranged at equal intervals, and two adjacent batteries are connected in series through a connecting row; the connecting row includes a connecting portion and two connecting terminals vertically arranged at the ends of the connecting portion, the two connecting terminals are respectively connected to the electrode connecting ports of the two adjacent batteries, and the connecting portion is located in the interval between the two adjacent batteries; a phase change material is pasted on the bottom of each battery in the battery pack and on the corresponding side wall between the two adjacent batteries.

[0006] The connecting bar and the phase change material are located in the gap between two adjacent batteries in the battery pack, forming a heat dissipation channel. There are two main benefits to sticking the phase change material on the side wall of the battery: first, a large amount of heat will be released during the discharge process of the battery, and the phase change material stuck on the side wall of the battery will absorb the heat released by the battery to prevent the battery temperature from being too high; then, as the battery continues to discharge, the heat released by the battery will be promptly diffused to the outside of the battery pack through the heat dissipation channel formed between the connecting bar and the phase change material.

[0007] It can be seen that the presence of phase change materials can not only absorb the heat released by the battery, but also form a heat dissipation channel inside the battery, thereby improving the heat dissipation performance of the battery pack. Therefore, the battery pack has good heat dissipation performance, which greatly reduces the risk of explosion caused by overheating of the battery pack.

[0008] Furthermore, the connecting bar is made of copper, brass or aluminum.

[0009] Furthermore, the connecting part has a "Z"-shaped structure, and the connecting part is sequentially a first connecting part, a second connecting part and a third connecting part from one end to the other end. The first connecting part and the third connecting part are arranged in parallel and perpendicular to the second connecting part, and the two connecting terminals are respectively arranged perpendicularly to the end of the first connecting part and the end of the third connecting part.

[0010] Furthermore, the electrode connection ports of the multiple batteries in the battery pack are arranged toward the head end or the tail end of the battery pack.

[0011] Furthermore, the electrode connection ports of the multiple batteries in the battery pack are arranged toward the rear end of the battery pack.

[0012] Further, the connection row includes a first connection row, a second connection row and a third connection row; in the first connection row, the length of the first connection part is smaller than the length of the third connection part, and the length of the third connection part is smaller than the length of the second connection part; in the second connection row and the third connection row, the length of the first connection part is equal to the length of the third connection part, the length of the third connection part is smaller than the length of the second connection part, and the length of the first connection part in the second connection row is smaller than the length of the first connection part in the third connection row.

[0013] Furthermore, the thickness of the phase change material is equal to the distance between two adjacent batteries in the battery pack.

[0014] Furthermore, the thickness of the connecting row is equal to the distance between two adjacent batteries in the battery pack.

[0015] Furthermore, the explosion-proof power battery pack that is easy to dissipate heat is placed in a battery pack mounting holder. Alternatively, the explosion-proof power battery pack that is easy to dissipate heat uses a clamp to fix multiple batteries together.

[0016] Compared with existing products, the heat-dissipating explosion-proof power battery pack of the present invention has the following advantages:

[0017] (1) The explosion-proof power battery pack with easy heat dissipation of the present invention connects multiple batteries in series through a connecting bar. The connecting bar is made of a material with good thermal conductivity, which can promptly diffuse the heat generated by battery discharge to the outside of the battery pack;

[0018] (2) The explosion-proof power battery pack that is easy to dissipate heat of the present invention has phase change material attached to the bottom side wall of the battery. The phase change material can absorb the heat released by the battery to prevent the battery temperature from being too high. At the same time, the connecting row and the phase change material are located in the gap between two adjacent batteries in the battery pack, forming a heat dissipation channel. The heat generated by the battery discharge can be promptly diffused to the outside of the battery pack. Therefore, the heat dissipation performance of the battery pack is good, which greatly reduces the risk of explosion caused by overheating of the battery pack.

[0019] (3) The heat-dissipating explosion-proof power battery pack of the present invention is provided with a phase change material. The phase change material has a certain elasticity and plays a shock-proof and buffering role in the battery pack, thereby preventing danger caused by collisions between batteries.

[0020] (4) The explosion-proof power battery pack with easy heat dissipation of the present invention can be placed in a battery pack mounting holder, or a plurality of batteries can be fixed together with a clamp. The plurality of batteries in the battery pack are connected in series through a connecting row. The battery pack is neatly arranged and has a regular structure, making it more convenient to carry or use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : A top view of the explosion-proof power battery pack that is easy to dissipate heat in Example 1.

[0022] Figure 2 : Schematic diagram of the three-dimensional structure of the first connecting row in Example 1.

[0023] Figure 3 : Right side view of the explosion-proof power battery pack that is easy to dissipate heat in Example 1.

[0024] Figure 4 : A top view of the explosion-proof power battery pack that is easy to dissipate heat in Example 2.

[0025] Figure 5 : Schematic diagram of the three-dimensional structure of the second connecting row in Example 2.

[0026] Figure 6 : Schematic diagram of the three-dimensional structure of the third connecting row in Example 2.

[0027] Figure 7 : A top view of the explosion-proof power battery pack that is easy to dissipate heat in Example 3.

[0028] Explanation of the reference numerals: 1-battery; 2-first connection row; 3-phase change material; 4-second connection row; 5-third connection row; 21-first connection portion; 22-second connection portion; 23-third connection portion; 24-first connection terminal; 25-second connection terminal; 241-first mounting through hole; 251-second mounting through hole. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below through specific embodiments.

[0030] Example 1

[0031] Example 1 provides an explosion-proof power battery pack that is easy to dissipate heat, such as Figure 1-3 The structural schematic diagram of the explosion-proof power battery pack is given.

[0032] The battery pack includes 6 batteries 1 connected in series, and the battery pack is placed in a battery mounting holder so that the position of the battery pack can be fixed. The 6 batteries 1 have the same size and structure, and are all rectangular structures. The electrode connection ports of the 6 batteries 1 are arranged in the same direction, and the 6 batteries 1 are arranged at equal intervals.

[0033] From one end to the other end of the battery pack, a first connecting row 2 is provided between every two adjacent batteries 1, and the positive and negative (or negative and positive) connection ports of two adjacent batteries 1 are respectively connected through the first connecting row 2. There are a total of 5 first connecting rows 2 in the battery pack.

[0034] The first connection row 2 includes a connection portion and two connection terminals. The connection portion is in a "Z"-shaped structure. The connection portion is sequentially a first connection portion 21, a second connection portion 22 and a third connection portion 23 from one end to the other. The first connection portion 21 and the third connection portion 23 are arranged in parallel and perpendicular to the second connection portion 22. The two connection terminals are respectively arranged perpendicularly at the ends of the first connection portion 21 and the third connection portion 23. The connection terminal arranged perpendicularly at the end of the first connection portion 21 is the first connection terminal 24, and the connection terminal arranged perpendicularly at the end of the third connection portion 23 is the second connection terminal 25. A first mounting through hole 241 is provided on the first connection terminal 24 in a thickness direction penetrating the first connection terminal 24, and a second mounting through hole 251 is provided on the second connection terminal 25 in a thickness direction penetrating the second connection terminal 25. The connecting bolts are sequentially replaced through the first mounting through hole 241 or the second mounting through hole 251 and the positive or negative connection port of the battery 1, thereby connecting the first connection row 2 with the positive or negative electrode of the battery 1.

[0035] The length of the first connection part 21 is smaller than the length of the third connection part 23, the length of the third connection part 23 is smaller than the length of the second connection part 22, and the thickness of the first connection row 2 is uniform, that is, the thickness of the first connection terminal 24, the second connection terminal 25, the first connection part 21, the second connection part 22 and the third connection part 23 are the same.

[0036] Between two adjacent batteries 1 in the battery pack, the first connection terminal 24 of the first connection row 2 is connected to the positive or negative connection port of the previous battery, and the second connection terminal 25 is connected to the negative or positive connection port of the next battery, and the first connection terminal 24 covers the top of the positive or negative connection port of the previous battery, and the second connection terminal 25 covers the top of the negative or positive connection port of the next battery, the first connection part 21 is located on the right side of the previous battery, the second connection part 22 is located in the gap between the two batteries, and the third connection part 23 is located on the left side of the next battery. In the batteries at the head end and the tail end of the battery pack, the positive or negative connection ports that are not connected to the first connection row 2 are respectively connected to external wires to provide power to electrical appliances.

[0037] Phase change material 3 is pasted on the lower part of each battery 1 in the battery pack, on the surface corresponding to the two adjacent batteries 1, and the thickness of the phase change material 3 is equal to the spacing between the two adjacent batteries 1, and the thickness of the first connection row 2 is equal to the width of the spacing between the two adjacent batteries 1. The height of the phase change material 3 is less than the height of the battery 1, and the height of the first connection row 2 is less than the height of the phase change material 3.

[0038] Phase change material 3 uses phase change material model 5000-9004 from Liwang New Materials.

[0039] In the battery pack, a battery heat dissipation channel is formed between two adjacent batteries 1, between the first connecting row 2 arranged on the upper part of the battery 1 and the phase change material 3 arranged on the lower part of the battery 1, and the heat generated by the discharge of the battery 1 can be well diffused to the outside of the battery pack through the heat dissipation channel; at the same time, the material of the first connecting row 2 is aluminum, brass or copper, all of which are good heat conductors, and the phase change material 3 also has excellent thermal conductivity, which can timely conduct the heat generated by the battery 1 to the battery heat dissipation channel, thereby diffusing it to the outside of the battery pack, thereby maximizing the heat dissipation effect of the battery pack and avoiding the occurrence of battery pack explosion accidents caused by overheating of the battery 1.

[0040] Example 2

[0041] Example 2 provides another explosion-proof power battery pack that is easy to dissipate heat, such as Figure 4-6 A structural schematic diagram of the explosion-proof power battery pack is given.

[0042] The structure of the explosion-proof power battery pack in Example 2 is basically the same as that in Example 1, except that among the six batteries 1 constituting the battery pack, from one end to the other end of the battery pack, the electrode connection ports of the first, third and fifth batteries face the same direction, and the electrode connection ports of the second, fourth and sixth batteries face opposite directions, and the six batteries 1 are arranged at equal intervals.

[0043] In this way, the distances between the connection ports of the positive and negative electrodes of every two adjacent batteries 1 are different. Therefore, the connection bars used in the battery pack have two structures, namely, the connection bars used between the first battery and the second battery, between the third battery and the fourth battery, and between the fifth battery and the sixth battery are of the same structure, which is recorded as the second connection bar 4; the connection bars used between the second battery and the third battery, and between the fourth battery and the fifth battery are of the same structure, which is recorded as the third connection bar 5;

[0044] In the second connection row 4 and the third connection row 5, the length of the first connection portion is equal to the length of the third connection portion, and the length of the third connection portion is less than the length of the second connection portion. The first connection portion and the third connection portion in the third connection row 5 both span the width of the battery 1, so the length of the first connection portion in the second connection row 4 is less than the length of the first connection portion in the third connection row 5.

[0045] Example 3

[0046] Example 3 provides another explosion-proof power battery pack that is easy to dissipate heat, such as Figure 7 A structural schematic diagram of the explosion-proof power battery pack is given.

[0047] The structure of the explosion-proof power battery pack in Example 3 is basically the same as that in Example 1, except that among the six batteries 1 constituting the battery pack, from one end to the other end of the battery pack, the connection ports of the first, third, fourth and fifth batteries face the same direction, and the connection ports of the second and sixth batteries face opposite directions, and the six batteries 1 are arranged at equal intervals.

[0048] Therefore, the distances between the connection ports of the positive and negative electrodes of every two adjacent batteries are different, so there are three structures of connection bars used in the battery pack, namely, the first connection bar 2, the second connection bar 4 and the third connection bar 5 given in Examples 1 and 2.

[0049] The second connecting bar 4 is located between the first and second batteries, and between the fifth and sixth batteries; the third connecting bar 5 is located between the second and third batteries; the first connecting bar 2 is located between the third and fourth batteries, and between the fourth and fifth batteries.

[0050] In the present invention, in addition to the three battery arrangements given in the above embodiments 1-3, there may be other arrangements, in which the connection ports between two adjacent batteries face different or the same directions, and a suitable first connection row 2, second connection row 4 or third connection row 5 is selected according to the battery arrangement to achieve series connection between different batteries.

[0051] Furthermore, in different applications, different numbers of batteries can be set according to actual needs, and the first connecting row 2, the second connecting row 4 or the third connecting row 5 with a suitable structure can be selected according to the arrangement of the batteries to achieve series connection between different batteries.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof power battery pack that is easy to dissipate heat, comprising a plurality of batteries connected in series, characterized in that: The size structure of the multiple batteries connected in series is the same, the multiple batteries are arranged at equal intervals, and two adjacent batteries are connected in series through a connecting row; the connecting row includes a connecting portion and two connecting terminals vertically arranged at the ends of the connecting portion, the two connecting terminals are respectively connected to the electrode connecting ports of two adjacent batteries, and the connecting portion is located in the interval between the two adjacent batteries; the bottom of each battery in the battery pack is pasted with a phase change material on the corresponding side wall between two adjacent batteries; the electrode connecting ports of the multiple batteries in the battery pack are arranged toward the head end or the tail end of the battery pack; the connecting row includes a first connecting row, a second connecting row and a third connecting row; the length of the first connecting portion in the first connecting row is less than the length of the third connecting portion, and the length of the third connecting portion is less than the length of the second connecting portion; in the second connecting row and the third connecting row, the length of the first connecting portion is equal to the length of the third connecting portion, the length of the third connecting portion is less than the length of the second connecting portion, and the length of the first connecting portion in the second connecting row is less than the length of the first connecting portion in the third connecting row.

2. The explosion-proof power battery pack with easy heat dissipation as claimed in claim 1, characterized in that: The connecting bar is made of copper, brass or aluminum.

3. The explosion-proof power battery pack with easy heat dissipation as claimed in claim 1, characterized in that: The connecting part has a "Z"-shaped structure, and the connecting part is sequentially a first connecting part, a second connecting part and a third connecting part from one end to the other end. The first connecting part and the third connecting part are arranged in parallel and perpendicular to the second connecting part. The two connecting terminals are respectively arranged perpendicularly at the end of the first connecting part and the end of the third connecting part.

4. The explosion-proof power battery pack with easy heat dissipation as claimed in claim 1, characterized in that: The thickness of the phase change material is equal to the distance between two adjacent batteries in the battery pack.

5. The explosion-proof power battery pack with easy heat dissipation as claimed in claim 1, characterized in that: The thickness of the connecting row is equal to the distance between two adjacent batteries in the battery pack.

6. The explosion-proof power battery pack with easy heat dissipation as claimed in claim 1, characterized in that: The explosion-proof power battery pack that is easy to dissipate heat is placed in a battery pack mounting seat.

7. The explosion-proof power battery pack with easy heat dissipation as claimed in claim 1, characterized in that: The explosion-proof power battery pack that is easy to dissipate heat uses a clamp to fix multiple batteries together.

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