Battery pack casing and kinetic energy battery

Abstract

The present disclosure provides a battery pack shell and a kinetic energy battery. The battery pack shell includes a shell, a plurality of battery cells and a protective plate. The battery cells and the protective plate are installed inside the shell. The shell is provided with a first accommodating cavity and a second accommodating cavity that are connected. The battery cell is located in the first accommodating cavity, and the protective plate is located in the second accommodating cavity. The shell is provided with a heat dissipation structure, and the heat dissipation structure is located between the battery cell and the protective plate. The heat dissipation structure is provided with a heat dissipation opening. The battery cell is located on one side of the heat dissipation structure, and the protective plate is located on the side corresponding to the heat dissipation structure. Since the heat dissipation structure is a through structure, the battery cell and the protective plate can dissipate heat through their respective sides of the heat dissipation structure when working, and exchange heat with the outside air, thereby improving the heat dissipation capacity. At this time, the heat dissipation effects of the battery cell and the protective plate will not affect each other, and the heat can be effectively dissipated and the safety performance of the battery can be guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of kinetic energy batteries, and in particular to a battery pack housing and a kinetic energy battery. Background Art

[0002] With the rapid development of the power battery industry, the application of power batteries is becoming more and more extensive, and the differences between power batteries of different types, capacities, shapes and sizes are becoming more and more obvious, so their heat dissipation requirements are also different. At present, traditional battery packs mainly rely on natural heat dissipation, and the heat dissipation risks come from overheating of the battery cells and overheating of components on the BMS board.

[0003] For battery packs that mainly rely on natural cooling, their heat dissipation capacity is often limited. Therefore, how to improve the heat dissipation capacity of the battery pack without adding active cooling measures becomes the key and difficulty; at the same time, the allowable temperatures of BMS board components and battery cells are different. General electronic components such as MOS tubes can work in an environment exceeding 100°C, while the maximum allowable temperature of battery cells generally does not exceed 70°C. When the distance between the two is close, the battery life is often affected.

[0004] To solve the above problems, a Chinese patent with publication number CN210576051U discloses a lithium battery BMS quick-install heat dissipation shell, which includes a metal shell, a first strap fixing part, a second strap fixing part, a second fixing hole, a BMS protective plate, a rubber strap, a first fixing hole, a first BMS protective plate fixing part, a second BMS protective plate fixing part, a third BMS protective plate fixing part, a fourth BMS protective plate fixing part and hollowing, and the fixing holes are evenly provided on the outside of the metal shell.

[0005] However, although the above-mentioned heat dissipation shell can solve the problem that the BMS protection plate of the battery shell is installed improperly and cannot dissipate heat, the heat dissipation effect of the heat dissipation shell mainly comes from the heat conduction to the metal shell, and the hollow area is small, resulting in limited heat dissipation space for the BMS protection plate, and the safety performance of the battery cannot be guaranteed.

[0006] Therefore, there is an urgent need for a battery pack casing that can effectively dissipate heat and ensure battery safety performance. Utility Model Content

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a battery pack housing and a kinetic energy battery that effectively dissipates heat and ensures battery safety performance.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] A battery pack shell includes a shell, a plurality of battery cells and a protective plate, wherein the battery cells and the protective plate are both installed inside the shell, and a first accommodating cavity and a second accommodating cavity that are connected are provided inside the shell, the battery cell is located in the first accommodating cavity, and the protective plate is located in the second accommodating cavity; the shell is provided with a heat dissipation structure, the heat dissipation structure is located between the battery cell and the protective plate, and the heat dissipation structure is provided with a heat dissipation opening.

[0010] In one of the embodiments, a transition chamber is further provided inside the shell, and the first accommodating chamber, the transition chamber and the second accommodating chamber are connected in sequence.

[0011] In one embodiment, a first bonding area is provided on an inner side of the housing facing away from the heat dissipation opening, and part of the battery cells are located in the first bonding area.

[0012] In one of the embodiments, a second bonding area is provided on the other inner side of the housing away from the heat dissipation opening, and the protection plate is located in the second bonding area.

[0013] In one embodiment, a heat dissipation area is provided on at least one inner side of the heat dissipation opening, and the heat dissipation area is used for installing a heat dissipation element.

[0014] In one of the embodiments, the heat sink is any one of a heat sink fin, a heat sink fan or a water cooling plate.

[0015] In one embodiment, the shell is made of aluminum or steel.

[0016] In one embodiment, the length of the heat dissipation opening ranges from 20 to 30 cm.

[0017] In one embodiment, the heat dissipation opening has a height ranging from 12 to 20 cm.

[0018] A kinetic energy battery comprises the battery pack casing described in any of the above embodiments.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] The above-mentioned battery pack shell has a heat dissipation structure in its shell, and the battery cell and the protection plate are both located inside the shell, the battery cell is located on one side of the heat dissipation structure, and the protection plate is located on the side corresponding to the heat dissipation structure. Since the heat dissipation structure is a through structure, the battery cell and the protection plate can dissipate heat through their respective sides of the heat dissipation structure during operation and exchange heat with the outside air, thereby improving the heat dissipation capacity. At this time, the heat dissipation effects of the battery cell and the protection plate will not affect each other. In this way, the heat can be effectively dissipated and the safety performance of the battery can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of a battery pack housing in one embodiment;

[0023] Figure 2 for Figure 1 A structural cross-sectional view of a battery pack housing shown;

[0024] Figure 3 for Figure 1 A structural cross-sectional view of the battery pack housing from another angle shown;

[0025] Figure 4 for Figure 1 The structural cross-sectional view of the battery pack housing shown in the state where a heat sink is installed on one side of the heat dissipation opening;

[0026] Figure 5 for Figure 1 The structural cross-sectional view of the battery pack housing shown in the state where heat dissipation elements are installed on both sides of the heat dissipation opening;

[0027] Figure 6 It is a structural cross-sectional view of a battery pack housing in another embodiment, wherein a heat dissipation groove is provided in the housing;

[0028] Figure 7 This is a structural cross-sectional view of a battery pack shell in another embodiment, wherein the shell is provided with a plurality of heat dissipation openings.

[0029] Figure numerals: 10, battery pack shell; 100, shell; 101, heat dissipation groove; 110, first accommodating cavity; 120, second accommodating cavity; 130, heat dissipation opening; 1301, heat dissipation sub-opening; 131, heat dissipation area; 132, heat dissipation element; 140, transition cavity; 150, first bonding area; 160, second bonding area; 200, battery cell; 300, protective plate. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The present application provides a battery pack shell, including a shell, a plurality of battery cells and a protective plate, wherein the battery cells and the protective plate are both installed inside the shell, and a first accommodating cavity and a second accommodating cavity that are connected are provided inside the shell, wherein the battery cell is located in the first accommodating cavity, and the protective plate is located in the second accommodating cavity; the shell is provided with a heat dissipation structure, wherein the heat dissipation structure is located between the battery cell and the protective plate, and wherein a heat dissipation vent is provided on the heat dissipation structure, wherein the heat dissipation vent is used to direct the heat generated by the battery cell and the protective plate during operation to the outside air.

[0034] The above-mentioned battery pack shell has a heat dissipation structure in its shell, and the battery cell and the protection plate are both located inside the shell, the battery cell is located on one side of the heat dissipation structure, and the protection plate is located on the side corresponding to the heat dissipation structure. Since the heat dissipation structure is a through structure, the battery cell and the protection plate can dissipate heat through their respective sides of the heat dissipation structure during operation and exchange heat with the outside air, thereby improving the heat dissipation capacity. At this time, the heat dissipation effects of the battery cell and the protection plate will not affect each other. In this way, the heat can be effectively dissipated and the safety performance of the battery can be guaranteed.

[0035] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0036] like Figures 1 to 3As shown, a battery pack shell 10 of an embodiment includes a shell 100, a plurality of battery cells 200 and a protection plate 300, the battery cells 200 and the protection plate 300 are both installed inside the shell 100, a first accommodating cavity 110 and a second accommodating cavity 120 are provided inside the shell 100, the battery cell 200 is located in the first accommodating cavity 110, and the protection plate 300 is located in the second accommodating cavity 120; the shell 100 is provided with a heat dissipation structure, the heat dissipation structure is located between the battery cell 200 and the protection plate 300, the heat dissipation structure is provided with a heat dissipation vent 130, and the heat dissipation vent 130 is used to direct the heat generated by the battery cell 200 and the protection plate 300 during operation to the outside air.

[0037] In this embodiment, if Figure 3 As shown, the heat dissipation structure is a through structure, that is, the heat dissipation vent 130 constitutes a through structure, which is conducive to separating the battery cell 200 and the protection plate 300. The battery cell 200 and the protection plate 300 dissipate heat when working. The heat generated by the battery cell 200 will be guided to the outside air from one side of the heat dissipation vent 130, and the heat generated by the protection plate 300 will be guided to the outside air from the other side of the heat dissipation vent 130, further achieving the heat dissipation effect of heat exchange with the outside, while the heat dissipation effect of the battery cell 200 and the protection plate 300 is not affected.

[0038] In another embodiment, if Figure 6 As shown, the heat dissipation structure is provided with a heat dissipation groove 101, which constitutes a semi-penetrating structure, which can also be used to separate the battery cell 200 and the protection plate 300, and can guide the heat generated by the battery cell 200 and the protection plate 300 during operation to the outside air without affecting each other.

[0039] In other embodiments, Figure 7 As shown, the heat dissipation structure is provided with a plurality of heat dissipation sub-openings 1301, and the plurality of heat dissipation sub-openings 1301 constitute a multi-penetrating structure, and its heat dissipation effect is the same as that of the above-mentioned penetrating structure and semi-penetrating structure.

[0040] It should be noted that the penetration structure, semi-penetration structure and multi-penetration structure are all within the protection scope of the present disclosure.

[0041] Furthermore, the protection board 300 includes but is not limited to various types of non-battery core high-heat electronic boards such as BMS, inverter, and main board.

[0042] like Figure 2As shown, in one embodiment, a transition chamber 140 is further provided inside the housing 100, and the first accommodating chamber 110, the transition chamber 140 and the second accommodating chamber 120 are sequentially connected. It can be understood that the battery cell 200 is located in the first accommodating chamber 110, the protection plate 300 is located in the second accommodating chamber 120, and the transition chamber 140 is arranged between the first accommodating chamber 110 and the second accommodating chamber 120, so as to separate the battery cell 200 and the protection plate 300, so that when the battery cell 200 and the protection plate 300 are working, the heat dissipation effects of the two will not be affected by each other.

[0043] like Figure 2 As shown, in one embodiment, a first bonding area 150 is provided on an inner side of the shell 100 away from the heat dissipation vent 130 , and part of the battery cells 200 are located in the first bonding area 150 , so that part of the battery cells 200 are fixed on an inner side of the shell 100 away from the heat dissipation vent 130 and connected to the shell 100 .

[0044] like Figure 2 As shown, in one embodiment, a second bonding area 160 is provided on the other inner side of the shell 100 away from the heat dissipation hole 130, and the protection plate 300 is located in the second bonding area 160, so that the protection plate 300 is fixed to the other inner side of the shell 100 away from the heat dissipation hole 130 and connected to the shell 100.

[0045] like Figure 1 and Figure 4 As shown in FIG. 1 , in one embodiment, at least one inner side of the heat dissipation opening 130 is provided with a heat dissipation area 131, and the heat dissipation area 131 is used to install a heat dissipation element 132. Furthermore, an interface (not shown) is provided within the heat dissipation area 131 for expanded application, and the interface is used to electrically connect the heat dissipation element 132 to enable the heat dissipation element 132 to work and improve the heat dissipation effect. Specifically, a heat dissipation area 131 can be provided on one side ( Figure 4 ) or both sides ( Figure 5 )Install heat sink 132.

[0046] In one embodiment, the heat sink 132 is any one of a heat sink fin, a heat sink fan or a water cooling plate. In this embodiment, the heat sink 132 can be a heat sink fin.

[0047] Specifically, by adding a heat dissipation fin or a heat dissipation fan to the heat dissipation area 131 of the heat dissipation opening 130, the heat dissipation mode can be changed from natural cooling to air cooling; by adding a water cooling plate to the heat dissipation area 131, the heat dissipation mode can be changed to liquid cooling. Both the air cooling mode and the liquid cooling mode can improve the heat dissipation effect.

[0048] In one embodiment, the housing 100 is made of aluminum or steel. In this embodiment, the housing 100 is made of aluminum, which can enhance the durability and structural strength of the battery pack.

[0049] In one embodiment, the length of the heat dissipation opening 130 ranges from 20 to 30 cm. In this embodiment, the length of the heat dissipation opening 130 is 20 cm.

[0050] In one embodiment, the height of the heat dissipation opening 130 ranges from 12 to 20 cm. In this embodiment, the height of the heat dissipation opening 130 is 15 cm, so that the battery cell 200 and the protection plate 300 have sufficient space to conduct heat to the outside, and there is enough height to install the heat dissipation element 132 in the heat dissipation area 131 to enhance the heat dissipation effect.

[0051] The present disclosure further provides a kinetic energy battery, comprising a battery pack housing 10 according to any of the above embodiments.

[0052] Compared with the prior art, the present invention has at least the following advantages:

[0053] The above-mentioned battery pack shell 10 has a shell 100 with a heat dissipation structure, and the battery cell 200 and the protection plate 300 are both located inside the shell 100, the battery cell 200 is located on one side of the heat dissipation structure, and the protection plate 300 is located on the side corresponding to the heat dissipation structure. Since the heat dissipation structure is a through structure (i.e., the heat dissipation opening 130), it can also be a semi-through structure (formed by the heat dissipation groove 101) or a multi-through structure (with multiple heat dissipation sub-openings 1301). The above structure allows the battery cell 200 and the protection plate 300 to dissipate heat through their respective sides of the heat dissipation structure during operation, and exchange heat with the outside air, thereby improving the heat dissipation capacity. At this time, the heat dissipation effects of the battery cell 200 and the protection plate 300 will not affect each other. In this way, the heat can be effectively dissipated and the safety performance of the battery can be guaranteed.

[0054] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A battery pack shell, comprising a shell, a plurality of battery cells and a protection plate, wherein the battery cells and the protection plate are both installed inside the shell, a first accommodating cavity and a second accommodating cavity are provided inside the shell, the battery cells are located in the first accommodating cavity, and the protection plate is located in the second accommodating cavity, characterized in that: The shell is provided with a heat dissipation structure, the heat dissipation structure is located between the battery core and the protection plate, and the heat dissipation structure is provided with a heat dissipation opening.

2. The battery pack housing according to claim 1, characterized in that: A transition chamber is also provided inside the shell, and the first accommodating chamber, the transition chamber and the second accommodating chamber are connected in sequence.

3. The battery pack housing according to claim 1, characterized in that: A first bonding area is provided on an inner side of the shell facing away from the heat dissipation opening, and part of the battery core is located in the first bonding area.

4. The battery pack housing according to claim 1, characterized in that: A second bonding area is provided on the other inner side of the shell away from the heat dissipation opening, and the protection plate is located in the second bonding area.

5. The battery pack housing according to claim 1, characterized in that: At least one inner side of the heat dissipation opening is provided with a heat dissipation area, and the heat dissipation area is used for installing a heat dissipation element.

6. The battery pack casing according to claim 5, characterized in that: The heat sink is any one of a heat sink fin, a heat sink fan or a water cooling plate.

7. The battery pack housing according to claim 1, characterized in that: The shell is made of aluminum or steel.

8. The battery pack housing according to claim 1, characterized in that: The length of the heat dissipation opening ranges from 20 to 30 cm.

9. The battery pack housing according to claim 1, characterized in that: The height range of the heat dissipation opening is 12 to 20 cm.

10. A kinetic energy battery, characterized in that: A battery pack casing comprising any one of claims 1 to 9.

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