Battery structure and energy storage device

Abstract

The invention belongs to the technical field of battery modules, and relates to a battery structure and an energy storage device, the battery structure comprises a heat dissipation piece, a shell, a battery core and a circuit board; an accommodating cavity is formed in the shell, and the battery cell and the circuit board are fixed in the accommodating cavity; the heat dissipation piece is fixed on the shell, at least part of the heat dissipation piece is exposed in external air, and the heat dissipation piece is used for dissipating heat of the shell, the battery core and the circuit board. The heat dissipation piece is fixed on the shell, and at least part of the heat dissipation piece is exposed in the external air, so that the heat dissipation piece can be in direct contact with the external environment, heat generated by the battery core and the circuit board in the shell and the accommodating cavity is more effectively conducted to the external environment, the heat dissipation effect of the battery structure is improved, and the service life of the battery structure is prolonged. The working temperature of the battery structure is reduced, and thermal runaway of the battery structure caused by untimely heat dissipation is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of battery modules, and more specifically, to a battery structure and an energy storage device. Background Art

[0002] At present, domestic electric two-wheeled vehicles generally use battery PACK to power the vehicle. Limited by the requirements of space and weight of the electric two-wheeled vehicle carrier, conventional battery PACK generally uses a square iron shell as the outer box, and integrates the battery pack and BMS (Battery Management System) protection board into the box. The heat dissipation aluminum sheet integrated on the protection board is also loaded into the box. The heat released by the battery core during charging and discharging is not actually discharged out of the box through the heat sink, and the heat is still gathered in the box. The heat dissipation effect of the battery PACK is poor, and there is a risk of thermal runaway. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present application is: in the prior art, the battery PACK of the electric two-wheeled vehicle has a poor heat dissipation effect and is prone to the risk of thermal runaway.

[0004] In order to solve the above technical problems, the present application provides a battery structure, which adopts the following technical solutions:

[0005] A battery structure includes a heat sink, a housing, a battery core and a circuit board;

[0006] The housing is provided with a receiving cavity inside, and the battery core and the circuit board are fixed in the receiving cavity;

[0007] The heat sink is fixed on the housing and at least a portion of the heat sink is exposed to the outside air. The heat sink is used to dissipate heat from the housing, the battery core and the circuit board.

[0008] Further, the outer shell includes a first shell, which is provided with a first opening connected to the accommodating cavity, the heat sink is fixed on the outer wall surface of the first shell, and the heat sink covers the first opening, and a first seal is provided on the outer periphery of the edge of the first opening, and the first shell and the heat sink are respectively in close contact with the first seal and squeeze the first seal.

[0009] Furthermore, a mounting groove corresponding to the first sealing member is provided on the heat sink and / or the first shell, and the first sealing member is fixed in the mounting groove.

[0010] Further, the battery structure further comprises a fastener, the heat sink comprises a heat sink, the heat sink has a certain thickness, and the heat sink covers the first opening;

[0011] The first housing has a first fixed edge, the first sealing member is arranged around the outer periphery of the first fixed edge, and a first screw hole is arranged on the first fixed edge;

[0012] The heat dissipation plate has a second fixed edge corresponding to the first fixed edge, the second fixed edge is provided with a second screw hole corresponding to the first screw hole, the second screw hole is located on a side of the second fixed edge facing the first opening, and the second screw hole does not penetrate the two fixed edges in the thickness direction of the heat dissipation plate;

[0013] The fastener passes through the first screw hole and is inserted into the second screw hole. The second fixing edge is fixedly connected to the first fixing edge through the fastener.

[0014] Further, the first shell further comprises a reinforcement member, the reinforcement member is arranged around the outer periphery of the first opening, the reinforcement member is fixed to a side of the first fixing edge away from the heat sink, a third screw hole corresponding to the first screw hole is provided on the reinforcement member, the fastener passes through the third screw hole and the first screw hole in sequence and then is inserted into the second screw hole; and / or,

[0015] The heat sink also includes heat sink fins, and the heat sink fins are fixed on a side of the heat sink plate away from the first opening.

[0016] Furthermore, the circuit board and the heat sink are arranged adjacent to each other, a heat conductor is provided between the circuit board and the heat sink, one end of the heat conductor is fixedly connected to the heat sink, and the other end is fixedly connected to the circuit board.

[0017] Furthermore, the battery structure also includes an antenna box and an antenna, the antenna box is fixed on the outer wall surface of the shell, the shell is provided with a second opening for the antenna to pass through, one end of the antenna is fixedly connected to the antenna box, and the other end passes through the second opening and extends into the accommodating cavity.

[0018] Furthermore, the housing further comprises a second shell, the first shell and the second shell are fixedly connected, a second seal is provided at the connection between the first shell and the second shell, and the second seal is used to seal the gap between the first shell and the second shell.

[0019] Furthermore, the battery structure further comprises a first limiting plate and a second limiting plate fixed on the inner wall surface of the second shell, the first limiting plate being located on a side of the second shell away from the first shell, and the second limiting plate being located on a side of the second shell close to the first shell;

[0020] The battery core at least includes a bar, a stop bar, and a first battery and a second battery arranged in parallel, the first battery includes a first body and a first extension, one end of the first body is fixed to the first limiting plate, the other end is provided with a first step, and the first extension is fixed to the first step; the second battery includes a second body and a second extension, one end of the second body is fixed to the first limiting plate, the other end is provided with a second step, and the second extension is fixed to the second step;

[0021] The bar piece connects the first extension part and the second extension part respectively, and a channel is formed among the bar piece, the first extension part, the first step, the second step and the second extension part. The second limiting plate and the baffle are located in the channel, and one end of the baffle piece abuts against the first step and the second step, and the other end abuts against the second limiting plate.

[0022] In order to solve the above technical problems, the embodiment of the present application further provides an energy storage device, which adopts the following technical solution:

[0023] An energy storage device comprises the battery structure as described above.

[0024] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0025] (1) The heat sink of the present application is fixed on the outer shell and at least part of the heat sink is exposed to the outside air, so that the heat sink can directly contact the external environment, thereby more effectively transferring the heat generated by the battery core and the circuit board in the outer shell and the accommodating cavity to the external environment, improving the heat dissipation effect of the battery structure, reducing the operating temperature of the battery structure, and avoiding thermal runaway of the battery structure due to untimely heat dissipation.

[0026] (2) The heat sink is fixed on the housing instead of being located in the accommodating cavity. The size of the heat sink is not limited by the size of the accommodating cavity, and the size setting of the heat sink is more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a schematic diagram of a three-dimensional structure of a battery structure provided by an embodiment of the present invention;

[0029] Figure 2is a cross-sectional schematic diagram of a heat sink, a first housing, and a circuit board provided in an embodiment of the present invention;

[0030] Figure 3 is an exploded schematic diagram of some components of a battery structure provided by an embodiment of the present invention;

[0031] Figure 4 is an exploded schematic diagram of some components of the battery structure provided by an embodiment of the present invention from another angle;

[0032] Figure 5 is a cross-sectional schematic diagram of a battery structure provided by an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of the three-dimensional structure of a battery core provided by an embodiment of the present invention;

[0034] Figure 7 Embodiment of the present invention Figure 2 The enlarged view of point A in the middle;

[0035] Figure 8 Embodiment of the present invention Figure 5 Enlarged view of point B in the middle.

[0036] Reference numerals:

[0037] 100. Battery structure; 1. Heat sink; 11. First seal; 12. Mounting groove; 13. Heat sink; 131. Second fixed edge; 132. Second screw hole; 14. Heat sink fin; 2. Shell; 21. Accommodating cavity; 22. First shell; 221. First opening; 222. First fixed edge; 223. First screw hole; 224. Reinforcement member; 2241. Third screw hole; 225. Second opening; 23. Second shell; 24. Second seal; 25. First limit plate ; 26. Second limit plate; 27. Support wall; 28. Epoxy resin board; 3. Battery core; 31. Bar; 32. Baffle; 33. First battery; 331. First body; 332. First extension; 333. First step; 34. Second battery; 341. Second body; 342. Second extension; 343. Second step; 35. Channel; 4. Circuit board; 5. Fastener; 6. Antenna box; 7. Antenna; 8. Heat conductor; 81. Threaded column; 82. Threaded groove. DETAILED DESCRIPTION

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0041] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0042] Please refer to Figures 1 to 3 The battery structure 100 of the present application includes a heat sink 1, a shell 2, a battery core 3 and a circuit board 4; a receiving cavity 21 is provided inside the shell 2, and the battery core 3 and the circuit board 4 are fixed in the receiving cavity 21; the heat sink 1 is fixed on the shell 2 and at least part of the heat sink 1 is exposed to the external air, and the heat sink 1 is used to dissipate heat from the shell 2, the battery core 3 and the circuit board 4.

[0043] In this embodiment, the heat sink 1 is fixed on the outer shell 2 and at least a portion of the heat sink 1 is exposed to the external air, so that the heat sink 1 can directly contact the external environment, thereby more effectively conducting the heat generated by the battery core 3 and the circuit board 4 in the outer shell 2 and the accommodating cavity 21 to the external environment, thereby improving the heat dissipation effect of the battery structure 100, reducing the operating temperature of the battery structure 100, and avoiding thermal runaway of the battery structure 100 due to untimely heat dissipation; in addition, the heat sink 1 is fixed on the outer shell 2 instead of being located in the accommodating cavity 21, the size of the heat sink 1 is not limited by the size of the accommodating cavity 21, and the size setting of the heat sink 1 is more flexible and convenient.

[0044] In this embodiment, the shapes of the shell 2 and the heat sink 1 are not limited. The shell 2 can be cylindrical, box-shaped or other shapes; the heat sink 1 can be columnar, plate-shaped or other shapes; the material of the heat sink 1 is made of a material with high thermal conductivity, and the material of the heat sink 1 can be made of aluminum alloy, copper alloy, ceramic and other materials. Preferably, the heat sink 1 is made of aluminum alloy. Aluminum alloy material has the advantages of high thermal conductivity, light weight, low cost, etc., and is suitable for manufacturing the heat sink 1; the fixing position of the heat sink 1 is not limited, and the heat sink 1 can be fixed on the top wall, side wall or other parts of the shell 2; the fixing method of the heat sink 1 is also not limited, and the heat sink 1 can be fixed to the shell 2 by welding, adhesive connection, screw connection or other methods.

[0045] In one embodiment, please refer to Figure 2 and Figure 7 The housing 2 includes a first shell 22, which is provided with a first opening 221 communicating with the accommodating cavity 21, the heat sink 1 is fixed on the outer wall of the first shell 22, and the heat sink 1 covers the first opening 221, and a first seal 11 is provided on the periphery of the edge of the first opening 221, and the first shell 22 and the heat sink 1 are in close contact with the first seal 11 and squeeze the first seal 11 respectively.

[0046] In this embodiment, the heat sink 1 is fixed on the outer wall of the first shell 22, and the first shell 22 is in direct contact with the heat sink 1, so that the heat of the first shell 22 is transferred to the heat sink 1 by direct heat conduction, thereby improving the heat dissipation effect of the heat sink 1 on the first shell 22; in addition, the first shell 22 is provided with a first opening 221 that is connected to the accommodating cavity 21, and the heat sink 1 covers the first opening 221. The hot air in the accommodating cavity 21 can directly contact the heat sink 1 through the first opening 221, thereby improving the heat dissipation effect of the heat sink 1 on the accommodating cavity 21. In this embodiment, the shape of the first opening 221 is not limited, and the first opening 221 can be rectangular, circular, triangular or other shapes.

[0047] In this embodiment, a first seal 11 is provided at the periphery of the edge of the first opening 221, and the first shell 22 and the heat sink 1 are respectively in close contact with the first seal 11 and squeeze the first seal 11. Specifically, since the battery structure 100 may be directly exposed to the external environment during use, the waterproof requirements of the battery structure 100 are relatively high. The first seal 11 can seal the gap at the connection between the first shell 22 and the heat sink 1 to prevent water and dust from entering the first opening 221 and the battery structure 100 through the gap at the connection between the first shell 22 and the heat sink 1, thereby ensuring the waterproofness and safety of the battery structure 100 while ensuring the heat dissipation effect.

[0048] In one embodiment, please refer to Figure 3 and Figure 4 . The heat sink 1 and / or the first shell 22 are provided with a mounting groove 12 corresponding to the first seal 11, and the first seal 11 is fixed in the mounting groove 12. In the present embodiment, the heat sink 1 and the first shell 22 can be arranged left and right or up and down. Preferably, the heat sink 1 and the first shell 22 are arranged up and down, and the heat sink 1 is fixed above the first shell 22. The mounting groove 12 can be arranged on the bottom surface of the heat sink 1 or the top surface of the first shell 22, or both the bottom surface of the heat sink 1 and the top surface of the first shell 22 are provided with a mounting groove 12. The first seal 11 can be fixed in the mounting groove 12 by adhesive connection, snap connection or other means. The mounting groove 12 provides an accommodating space for the first seal 11, so that the first seal 11 is firmly fixed on the heat sink 1 or the first shell 22.

[0049] In one embodiment, please refer to Figure 3 and Figure 4 The battery structure 100 further includes a fastener 5, the heat sink 1 includes a heat sink 13, the heat sink 13 has a certain thickness, and the heat sink 13 covers the first opening 221; the first shell 22 has a first fixed edge 222, the first seal 11 is arranged around the outer periphery of the first fixed edge 222, and the first fixed edge 222 is provided with a first screw hole 223; the heat sink 13 has a second fixed edge 131 corresponding to the first fixed edge 222, and the second fixed edge 131 is provided with a second screw hole 132 corresponding to the first screw hole 223, the second screw hole 132 is located on the side of the two fixed edges facing the first opening 221, and the second screw hole 132 does not penetrate the two fixed edges in the thickness direction of the heat sink 13; the fastener 5 passes through the first screw hole 223 and then is inserted into the second screw hole 132, and the second fixed edge 131 is fixedly connected to the first fixed edge 222 through the fastener 5.

[0050] In this embodiment, the fastener 5 may be a screw or a bolt. The first sealing member 11 is arranged around the outer periphery of the first fixing edge 222, the first fixing edge 222 is provided with a first screw hole 223, the heat sink 13 has a second fixing edge 131 arranged corresponding to the first fixing edge 222, the second fixing edge 131 is provided with a second screw hole 132 corresponding to the first screw hole 223, the first fixing edge 222 and the second fixing edge 131 are both arranged in the first sealing member 11, which can prevent external water or dust from entering the first screw hole 223 and the second screw hole 132.

[0051] In this embodiment, the heat sink 13 has a certain thickness, and the second screw hole 132 is located on the side of the two fixed edges facing the first opening 221. The second screw hole 132 does not penetrate the two fixed edges in the thickness direction of the heat sink 13, which can ensure that there are no openings in the part of the heat sink 13 exposed to the outside air, thereby preventing external water or dust from entering the accommodating cavity 21 through the heat sink 13.

[0052] In one embodiment, please refer to Figure 3 and Figure 4 The first shell 22 further includes a reinforcing member 224, which is arranged around the outer periphery of the first opening 221 and fixed to a side of the first fixing edge 222 away from the heat sink 13. The reinforcing member 224 is provided with a third screw hole 2241 corresponding to the first screw hole 223. The fastener 5 passes through the third screw hole 2241 and the first screw hole 223 in sequence and then is inserted into the second screw hole 132.

[0053] In this embodiment, a reinforcement member 224 is provided at the periphery of the first opening 221 , and the reinforcement member 224 can strengthen the edge of the first opening 221 and the first fixed edge 222 to prevent the edge of the first opening 221 and the first fixed edge 222 from deformation, thereby ensuring the sealing effect between the first sealing member 11 and the edge of the first opening 221 .

[0054] In one embodiment, please refer to Figure 2 and Figure 3 The heat sink 1 also includes heat sink fins 14, which are fixed to a side of the heat sink 13 away from the first opening 221. In this embodiment, the heat sink fins 14 can increase the heat dissipation area of ​​the heat sink 1, so that more heat can be transferred to the air faster, thereby improving the heat dissipation efficiency of the heat sink 1.

[0055] In one embodiment, please refer to Figure 2 and Figure 7 The circuit board 4 is disposed adjacent to the heat sink 1, and a heat conductor 8 is disposed between the circuit board 4 and the heat sink 1, and one end of the heat conductor 8 is fixedly connected to the heat sink 1, and the other end is fixedly connected to the circuit board 4. In this embodiment, the circuit board 4 can be a BMS protection board, the circuit board 4 is disposed adjacent to the heat sink 1, and the circuit board 4 and the heat sink 1 are connected through the heat conductor 8, so that the heat of the circuit board 4 is transferred to the heat sink 1 through the heat conductor 8, thereby improving the heat dissipation effect of the circuit board 4.

[0056] In this embodiment, the material of the heat conductor 8 is made of a material with high thermal conductivity, and the material of the heat conductor 8 can be made of aluminum alloy, copper metal, ceramics and the like. Preferably, the heat conductor 8 is made of copper metal. The specific shape of the heat conductor 8 is not limited, and the heat conductor 8 can be cylindrical, plate-shaped or other shapes. The fixing method of the heat conductor 8 is also not limited, and the heat conductor 8 can be fixedly connected to the circuit board 4 and the heat sink 1 by welding, riveting, screw connection and the like.

[0057] In a specific embodiment, a threaded column 81 is provided at one end of the heat conductor 8, and a threaded groove 82 is opened on the other end. The threaded column 81 is inserted into the screw hole of the heat sink 1 to be threadedly connected with the heat sink 1. A screw hole corresponding to the threaded groove 82 is provided on the circuit board 4. The screw passes through the screw hole and is inserted into the threaded groove 82, thereby fixing the circuit board 4 on the heat conductor 8.

[0058] Furthermore, in order to increase the contact area between the circuit board 4 and the heat sink 1, a thermally conductive silicone member (not shown in the figure) is arranged between the circuit board 4 and the heat sink 1. The thermally conductive silicone member can transfer the heat of the circuit board 4 to the heat sink 1, thereby improving the heat dissipation effect of the heat sink 13 on the circuit board 4; the thermally conductive silicone member can be fixedly connected to the circuit board 4 and the heat sink 1 respectively by means of glue.

[0059] In one embodiment, please refer to Figure 3 and Figure 4 The battery structure 100 further includes an antenna box 6 and an antenna 7. The antenna box 6 is fixed on the outer wall of the housing 2. The housing 2 is provided with a second opening 225 for the antenna 7 to pass through. One end of the antenna 7 is fixedly connected to the antenna box 6, and the other end passes through the second opening 225 and extends into the accommodating cavity 21.

[0060] In this embodiment, the antenna box 6 and the antenna 7 are used to receive and send signals, thereby ensuring that the battery structure 100 can communicate with the outside world unimpeded. The antenna box 6 is fixed to the outer wall of the housing 2, which can prevent the heat generated inside the battery structure 100 from adversely affecting the performance of the electronic components of the antenna box 6; in addition, the antenna 7 passes through the second opening 225 and extends into the accommodating cavity 21, and the antenna 7 does not occupy the external space of the battery structure 100, which is conducive to the miniaturization of the battery structure 100.

[0061] In one embodiment, please refer to Figure 5 The housing 2 further includes a second housing 23. The first housing 22 and the second housing 23 are fixedly connected. The first housing 22 and the second housing 23 jointly enclose a receiving cavity 21. A second sealing member 24 is provided at the connection between the first housing 22 and the second housing 23. The second sealing member 24 is used to seal the gap between the first housing 22 and the second housing 23. In this embodiment, the second sealing member 24 prevents water and dust from entering the battery structure 100 through the gap between the first housing 22 and the second housing 23, thereby improving the sealing performance of the battery structure 100.

[0062] In one embodiment, please refer to Figures 5 to 8The battery structure 100 also includes a first limit plate 25 and a second limit plate 26 fixed on the inner wall surface of the second shell 23. The first limit plate 25 is located on the side of the second shell 23 away from the first shell 22, and the second limit plate 26 is located on the side of the second shell 23 close to the first shell 22. In this embodiment, the first shell 22 and the second shell 23 can be arranged left and right or up and down; the first limit plate 25 and the second limit plate 26 can be directly fixed to the inner wall surface of the second shell 23, or indirectly fixed to the inner wall surface of the second shell 23. In a preferred embodiment, the first shell 22 is fixed above the second shell 23, and the second shell 23 includes a bottom wall and a side wall fixed on the bottom wall. A vertically arranged support wall 27 is also provided in the second shell 23, and the support wall 27 is fixedly connected to the side wall. The first limit plate 25 is directly fixed to the bottom wall, and the second limit plate 26 is fixed to the support wall 27.

[0063] Furthermore, the battery core 3 at least includes a bar 31, a stop bar 32, and a first battery 33 and a second battery 34 arranged in parallel. The first battery 33 includes a first body 331 and a first extension 332. One end of the first body 331 is fixed on the first limiting plate 25, and the other end is provided with a first step 333. The first extension 332 is fixed on the first step 333. The second battery 34 includes a second body 341 and a second extension 342. One end of the second body 341 is fixed on the first limiting plate 25. , a second step 343 is provided on the other end, and the second extension part 342 is fixed on the second step 343; the bar 31 is respectively connected to the first extension part 332 and the second extension part 342, and a channel 35 is formed among the bar 31, the first extension part 332, the first step 333, the second step 343 and the second extension part 342, the second limiting plate 26 and the baffle 32 are located in the channel 35, and one end of the baffle 32 abuts against the first step 333 and the second step 343, and the other end abuts against the second limiting plate 26.

[0064] In this embodiment, the first limiting plate 25, the second limiting plate 26 and the baffle 32 jointly provide a limiting function for the first battery 33 and the second battery 34 in the up and down directions, thereby preventing the first battery 33 and the second battery 34 from moving in the up and down directions; in addition, the second limiting plate 26 and the baffle 32 are located in the channel 35, and the space of the channel 35 can be fully utilized to place the second limiting plate 26 and the baffle 32, thereby improving the compactness of the battery structure 100 and facilitating the miniaturization of the battery structure 100.

[0065] In one embodiment, the battery structure 100 further includes an epoxy resin plate 28 , which is disposed between the support wall 27 and the battery core 3 to cover the battery core 3 . The epoxy resin plate 28 can prevent friction static electricity from being generated between the battery core 3 and the support wall 27 .

[0066] According to an embodiment of the present invention, there is further provided an energy storage device, comprising the battery structure 100 as described above.

[0067] In this embodiment, the energy storage device includes a battery structure 100, and the battery structure 100 includes a heat sink 1, a housing 2, a battery core 3 and a circuit board 4; a housing 2 is provided with a housing cavity 21, and the battery core 3 and the circuit board 4 are fixed in the housing cavity 21; the heat sink 1 is fixed on the housing 2 and at least part of the heat sink 1 is exposed to the outside air, and the heat sink 1 is used to dissipate heat from the housing 2, the battery core 3 and the circuit board 4. The heat sink 1 is fixed on the housing 2 and at least part of the heat sink 1 is exposed to the outside air, so that the heat sink 1 can directly contact the external environment, thereby more effectively conducting the heat generated by the battery core 3 and the circuit board 4 in the housing 2 and the housing cavity 21 to the external environment, improving the heat dissipation effect of the battery structure 100, reducing the operating temperature of the battery structure 100, and avoiding thermal runaway of the battery structure 100 due to untimely heat dissipation; in addition, the heat sink 1 is fixed on the housing 2, rather than being located in the housing cavity 21, and the size of the heat sink 1 is not limited by the size of the housing cavity 21, and the size setting of the heat sink 1 is more flexible and convenient.

[0068] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A battery structure, characterized in that: Including heat sink, housing, battery cell and circuit board; The housing is provided with a receiving cavity inside, and the battery core and the circuit board are fixed in the receiving cavity; The heat sink is fixed on the housing and at least a portion of the heat sink is exposed to the outside air. The heat sink is used to dissipate heat from the housing, the battery core and the circuit board.

2. The battery structure according to claim 1, characterized in that: The housing includes a first shell, which is provided with a first opening connected to the accommodating cavity, the heat sink is fixed on the outer wall surface of the first shell, and the heat sink covers the first opening, and a first seal is provided on the outer periphery of the edge of the first opening, and the first shell and the heat sink are respectively in close contact with the first seal and squeeze the first seal.

3. The battery structure according to claim 2, characterized in that: The heat sink and / or the first shell are provided with a mounting groove corresponding to the first sealing member, and the first sealing member is fixed in the mounting groove.

4. The battery structure according to claim 2, characterized in that: The battery structure further includes a fastener, the heat sink includes a heat sink, the heat sink has a certain thickness, and the heat sink covers the first opening; The first housing has a first fixed edge, the first sealing member is arranged around the outer periphery of the first fixed edge, and a first screw hole is arranged on the first fixed edge; The heat dissipation plate has a second fixed edge corresponding to the first fixed edge, the second fixed edge is provided with a second screw hole corresponding to the first screw hole, the second screw hole is located on a side of the second fixed edge facing the first opening, and the second screw hole does not penetrate the two fixed edges in the thickness direction of the heat dissipation plate; The fastener passes through the first screw hole and is inserted into the second screw hole. The second fixing edge is fixedly connected to the first fixing edge through the fastener.

5. The battery structure according to claim 4, characterized in that: The first shell further includes a reinforcement member, the reinforcement member is arranged around the outer periphery of the first opening, the reinforcement member is fixed to a side of the first fixing edge away from the heat sink, a third screw hole corresponding to the first screw hole is provided on the reinforcement member, the fastener passes through the third screw hole and the first screw hole in sequence and then is inserted into the second screw hole; and / or, The heat sink also includes heat sink fins, and the heat sink fins are fixed on a side of the heat sink plate away from the first opening.

6. The battery structure according to any one of claims 1 to 5, characterized in that: The circuit board is arranged adjacent to the heat sink, a heat conducting member is arranged between the circuit board and the heat sink, one end of the heat conducting member is fixedly connected to the heat sink, and the other end of the heat conducting member is fixedly connected to the circuit board.

7. The battery structure according to any one of claims 1 to 5, characterized in that: The battery structure also includes an antenna box and an antenna. The antenna box is fixed on the outer wall of the shell. The shell is provided with a second opening for the antenna to pass through. One end of the antenna is fixedly connected to the antenna box, and the other end passes through the second opening and extends into the accommodating cavity.

8. The battery structure according to any one of claims 2 to 5, characterized in that: The housing further comprises a second shell, the first shell and the second shell are fixedly connected, a second seal is provided at the connection between the first shell and the second shell, and the second seal is used to seal the gap between the first shell and the second shell.

9. The battery structure according to claim 8, characterized in that: The battery structure further includes a first limiting plate and a second limiting plate fixed on the inner wall surface of the second shell, the first limiting plate being located on a side of the second shell away from the first shell, and the second limiting plate being located on a side of the second shell close to the first shell; The battery core at least includes a bar, a stop bar, and a first battery and a second battery arranged in parallel, the first battery includes a first body and a first extension, one end of the first body is fixed to the first limiting plate, the other end is provided with a first step, and the first extension is fixed to the first step; the second battery includes a second body and a second extension, one end of the second body is fixed to the first limiting plate, the other end is provided with a second step, and the second extension is fixed to the second step; The bar piece connects the first extension part and the second extension part respectively, and a channel is formed among the bar piece, the first extension part, the first step, the second step and the second extension part. The second limiting plate and the baffle are located in the channel, and one end of the baffle piece abuts against the first step and the second step, and the other end abuts against the second limiting plate.

10. An energy storage device, characterized in that: Comprising the battery structure as claimed in any one of claims 1 to 9.

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