Battery and battery module

Abstract

The invention discloses a battery and a battery module, and relates to the field of batteries, the battery comprises a shell, a diffusion seat, liquid absorption seats and electrode plates, the inner side of the diffusion seat is provided with a containing cavity, the liquid absorption seats are arranged on the two sides of the diffusion seat in a central symmetry manner, a diaphragm is arranged between the liquid absorption seats and the diffusion seat, and the electrode plates are arranged in the containing cavity. A plurality of electrode plate grooves which are uniformly distributed are formed in the side, away from the diffusion seat, of the liquid absorption seat, the electrode plates are of a continuously-bent integral structure, the surfaces of the electrode plates are in uniform contact with the inner surfaces of the electrode plate grooves after being bent, and the electrode plates are composed of positive plate bodies and negative plate bodies; and a heat dissipation film is arranged on one side, far away from the liquid absorption seat, of the electrode plate. According to the battery and the battery module, the diffusion seat, the liquid absorption seat, the upper liquid absorption pad and the gel film are matched with one another, so that the electrolyte can be uniformly infiltrated on the surface of the electrode plate in various environments, the power supply effect of the battery is ensured, the electrode plate and the heat dissipation film are integrally processed and formed, the heat dissipation efficiency of the electrode is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery and a battery module. Background Art

[0002] Non-aqueous electrolyte batteries usually use organic solvents or ionic liquids as electrolytes to improve the stability and safety of the battery. Among them, lithium-ion batteries are currently the most popular non-aqueous electrolyte batteries and are widely used in electric bicycles.

[0003] In the prior art, non-aqueous electrolyte batteries are mainly composed of a positive electrode, a negative electrode, an electrolyte, a diaphragm and a casing. When an electric bicycle is climbing a slope, the battery will be in a tilted state for a long time, resulting in the electrolyte being unable to fully infiltrate the positive and negative electrodes of the battery, affecting the power supply effect of the battery. In addition, the electrodes will accumulate more heat during the continuous power supply process, and the influence of high temperature will aggravate the consumption of the electrolyte and affect the service life and safety of the battery.

[0004] In view of this, a battery and a battery module are proposed. Summary of the invention

[0005] Technical problem to be solved: When an electric bicycle is climbing a slope, the electrolyte cannot fully infiltrate the positive and negative electrodes of the battery. During the continuous power supply process, the electrodes of the battery will accumulate more heat. The high temperature will aggravate the consumption of the electrolyte and affect the service life and safety of the battery.

[0006] In view of the deficiencies in the prior art, the present invention provides a battery and a battery module, thereby solving the technical problems mentioned in the background technology.

[0007] Technical solution:

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A battery, comprising: a shell, a ceramic base is embedded on the inner bottom wall of the shell, a diffusion seat is arranged above and near the center of the ceramic base, a receiving cavity is arranged inside the diffusion seat, the receiving cavity is used to receive electrolyte, and the electrolyte is evenly diffused on the diffusion seat;

[0010] A liquid suction seat, the liquid suction seat is centrally symmetrically arranged on both sides of the diffusion seat, a diaphragm is arranged between the liquid suction seat and the diffusion seat, and a plurality of evenly distributed electrode slots are opened on the side of the liquid suction seat away from the diffusion seat;

[0011] The electrode sheet is a continuously bent integral structure, and the surface of the electrode sheet is in uniform contact with the inner surface of the electrode sheet groove after being bent, and the electrode sheet is composed of a positive electrode sheet and a negative electrode sheet, the positive electrode sheet is connected to the liquid suction seat on the right, and the negative electrode sheet is connected to the liquid suction seat on the left, and a heat dissipation film is provided on the electrode sheet and on a side away from the liquid suction seat;

[0012] The protective cover is arranged above the shell and is fixedly connected with the top of the shell.

[0013] In one possible implementation, two groups of parallel strip edges are provided at the top center of the ceramic base, the strip edges are snap-fitted with the bottom edge of the diffuser seat, and a liquid injection port connected to the accommodating cavity is provided at the top of the shell, and a sealing cover is connected above the liquid injection port.

[0014] In a possible implementation, the top of the diffusion seat contacts the inner top wall of the shell, upper absorbent pads are provided on both sides of the diffusion seat and above the absorbent seat, and the upper absorbent pads on the left and right sides are symmetrically distributed between the center.

[0015] In a possible implementation, the diffusion seat, the liquid absorbing seat and the upper liquid absorbing pad are all made of three-dimensional porous materials, and the electrolyte is gradually and evenly diffused to the liquid absorbing seat and the upper liquid absorbing pad along the diffusion seat.

[0016] In one possible implementation, the top of the positive electrode sheet is connected to the positive electrode seat, and the top of the positive electrode seat is provided with a positive electrode ear extending above the shell. The top of the negative electrode sheet is connected to the negative electrode seat, and the top of the negative electrode seat is provided with a negative electrode ear extending above the shell.

[0017] In a possible implementation, a gel film is arranged between the surface of the electrode sheet and the liquid absorption seat, and the gel film is made of a polymer gel material. The electrode sheet, the gel film and the heat dissipation film are integrally formed, and after the electrode sheet is continuously bent, there is a gap between adjacent surfaces of the heat dissipation film, and the width of the gap is 0.1-0.5mm.

[0018] In a possible implementation, the heat dissipation film is composed of a heat conductive layer, an inner isolation layer and an outer isolation layer, the inner isolation layer is arranged between the heat conductive layer and the surface of the electrode sheet, and the outer isolation layer is arranged outside the heat conductive layer.

[0019] In a possible implementation, heat sinks are embedded on the left and right inner walls of the shell, the heat sinks are in contact with the surface of the heat dissipation film, four-pointed star-shaped grooves are provided on the front and rear side walls of the shell, heat sinks are symmetrically distributed on the outside of the grooves, and the heat sinks are integrally formed with the shell.

[0020] In a possible implementation, an arc-shaped plate is provided on the top of the shell and on the outer sides of the positive electrode ear and the negative electrode ear, a fixing block is provided on the top of the shell and near the four corners, a fixing groove is provided on the bottom of the protective cover and near the four corners, the fixing groove and the fixing block are engaged with each other, a wiring cavity is provided on the protective cover and on the outer side of the arc-shaped plate, the wiring cavities on the left and right sides are connected to each other, and outlets connected to the wiring cavity are provided on the front and rear side walls of the protective cover.

[0021] In addition, the present invention also provides a battery module, which is composed of a plurality of batteries distributed in an array, and the batteries are connected in series. When the batteries form the battery module, a plurality of heat dissipation strips on adjacent shells cooperate with each other to form an air flow channel.

[0022] Beneficial effects:

[0023] In the present solution, by providing a diffusion seat and a liquid absorption seat, the inclined side of the liquid absorption seat can contact the large surface of the diffusion seat, thereby improving the diffusion and infiltration effect of the electrolyte on the liquid absorption seat. The diffusion seat, the liquid absorption seat, the upper liquid absorption pad and the gel membrane cooperate with each other to improve the liquid absorption efficiency, so that the electrolyte can be evenly infiltrated on the surface of the electrode sheet under various environments, thereby improving the power supply effect of the battery when the electric bicycle climbs a slope, reducing the leakage and volatilization of the electrolyte, and extending the service life of the battery.

[0024] In this solution, the electrode sheet adopts a continuously bent overall structure, which can enhance the structural strength and stability of the battery. At the same time, the electrode sheet and the heat dissipation film are integrally processed and formed, so that the heat dissipation film and the surface of the electrode sheet can be in contact with each other, thereby expanding the effective heat conduction area of ​​the positive and negative electrodes of the battery, improving the heat dissipation efficiency of the battery, and enhancing the thermal stability of the battery after long-term use.

[0025] In this solution, grooves and heat dissipation strips are arranged on the surface of the shell. When multiple batteries are used to form a battery module, the multiple heat dissipation strips on adjacent shells cooperate with each other to form an air flow channel, thereby enhancing the air guidance and diffusion effects, improving the heat dissipation effect of the battery module during use, and avoiding overheating of the battery and affecting the service life and power supply performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention;

[0029] Figure 3 A top view of the battery structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the liquid suction seat of the present invention;

[0031] Figure 5 For the present invention Figure 3 A magnified view of part A;

[0032] Figure 6 It is a schematic diagram of the electrode sheet structure of the present invention;

[0033] Figure 7 It is a schematic diagram of the heat dissipation film structure of the present invention;

[0034] Figure 8 It is a schematic diagram of the protective cover of the present invention.

[0035] Legend: 1. Shell; 11. Ceramic base; 111. Strip edge; 12. Liquid filling port; 121. Sealing cover; 13. Arc plate; 14. Fixing block; 15. Groove; 16. Heat dissipation strip; 2. Diffusion seat; 21. Accommodation cavity; 3. Diaphragm; 4. Liquid absorption seat; 41. Electrode plate groove; 42. Upper liquid absorption pad; 5. Electrode plate; 51. Positive electrode plate; 52. Negative electrode plate; 53. Positive electrode seat; 531. Positive electrode ear; 54. Negative electrode seat; 541. Negative electrode ear; 6. Gel film; 7. Heat dissipation film; 71. Thermal conductive layer; 72. Inner isolation layer; 73. Outer isolation layer; 8. Heat dissipation plate; 9. Protective cover; 91. Fixing groove; 92. Wiring cavity; 93. Wire outlet. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various forms, so the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components that are not connected with the invention will be omitted from the drawings.

[0037] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0038] This embodiment introduces the specific structure of a battery and a battery module.

[0039] like Figure 1-Figure 8 As shown, a battery comprises: a shell 1, a ceramic base 11 is embedded on the inner bottom wall of the shell 1, a diffusion seat 2 is arranged above and near the center of the ceramic base 11, and a receiving cavity 21 is arranged inside the diffusion seat 2, the receiving cavity 21 is used to receive an electrolyte, and the electrolyte is evenly diffused on the diffusion seat 2;

[0040] The liquid suction seat 4 is centrally symmetrically arranged on both sides of the diffusion seat 2, and a plurality of evenly distributed electrode slots 41 are provided on the liquid suction seat 4 and on a side away from the diffusion seat 2;

[0041] The electrode sheet 5 is a continuously bent integral structure, and the surface of the electrode sheet 5 is in uniform contact with the inner surface of the electrode sheet groove 41 after bending. The electrode sheet 5 is composed of a positive electrode sheet 51 and a negative electrode sheet 52. The positive electrode sheet 51 is connected to the liquid absorption seat 4 on the right, and the negative electrode sheet 52 is connected to the liquid absorption seat 4 on the left. A heat dissipation film 7 is provided on the electrode sheet 5 and on the side away from the liquid absorption seat 4.

[0042] In this embodiment, the orthographic projection of the diffusion seat 2 is a parallelogram structure, and the orthographic projection of the liquid absorption seat 4 is a right-angled trapezoidal structure, so that the inclined side of the liquid absorption seat 4 can contact the large surface of the diffusion seat 2, thereby improving the diffusion and wetting effect of the electrolyte on the liquid absorption seat 4, and ensuring that the positive electrode sheet 51 and the negative electrode sheet 52 can be in uniform contact with the electrolyte.

[0043] Furthermore, the positive electrode sheet 51 and the negative electrode sheet 52 are designed to be a continuously bent integral structure, and the heat dissipation film 7 and the electrode sheet 5 are integrally processed and formed, so that the heat dissipation film 7 can be in contact with the surface of the electrode sheet 5, thereby expanding the effective heat conduction area of ​​the positive and negative electrodes of the battery, improving the heat dissipation efficiency of the battery, and enhancing the thermal stability of the battery after long-term use.

[0044] like Figure 2-Figure 4 As shown, two groups of parallel strip edges 111 are arranged at the top center of the ceramic base 11, and the strip edges 111 are snap-fitted with the bottom edge of the diffusion seat 2. The ceramic base 11 plays a sealing and protective role at the bottom of the diffusion seat 2. A liquid injection port 12 connected to the accommodating cavity 21 is arranged at the top of the shell 1. The liquid injection port 12 is located directly above the accommodating cavity 21, and a sealing cover 121 is snap-fitted and fixed above the liquid injection port 12. When the sealing cover 121 is opened, the electrolyte can be injected into the interior of the accommodating cavity 21 through the liquid injection port 12.

[0045] The top of the diffusion seat 2 contacts the inner top wall of the shell 1, and upper liquid absorbing pads 42 are provided on both sides of the diffusion seat 2 and above the liquid absorbing seat 4. The upper liquid absorbing pads 42 on the left and right sides are distributed symmetrically between the center. Through the cooperation between the liquid absorbing seat 4 and the upper liquid absorbing pad 42, the electrode sheet 5 can be evenly contacted with the electrolyte.

[0046] In addition, since the battery will tilt when the electric bicycle goes uphill, if the battery tilts during use, the trapezoidal structure of the liquid absorption seat 4 and the upper liquid absorption pad 42 cooperate with each other to ensure that the electrode sheet 5 is fully infiltrated with electrolyte, ensuring the power supply effect of the vehicle when going uphill.

[0047] A diaphragm 3 is arranged between the liquid absorption seat 4 and the diffusion seat 2. The diaphragm 3 is made of PE / PP composite material diaphragm or ceramic material diaphragm, both of which have thermal stability and mechanical strength, and can allow ions to diffuse evenly from the diffusion seat 2 to the liquid absorption seat 4, ensuring that the positive electrode sheet 51 and the negative electrode sheet 52 can be in uniform contact with the electrolyte.

[0048] At the same time, in order to further improve the thermal stability of the diaphragm 3, ceramic particles can be coated on the surface of the PE / PP composite diaphragm to form a composite diaphragm of polyolefin and ceramic materials.

[0049] The diffusion seat 2 , the liquid absorbing seat 4 and the upper liquid absorbing pad 42 are all made of three-dimensional porous materials, and the electrolyte gradually and evenly diffuses along the diffusion seat 2 to the liquid absorbing seat 4 and the upper liquid absorbing pad 42 .

[0050] In this embodiment, the diffusion seat 2 is made of porous ceramic material, which ensures that the electrolyte can be evenly diffused while ensuring that the diffusion seat 2 has sufficient strength. The wicking seat 4 and the upper wicking pad 42 are both made of polyethylene and silicone composite materials, which can improve the wicking efficiency while ensuring their structural strength, ensuring that the electrolyte can evenly infiltrate the surface of the electrode sheet 5 under a variety of environments, and reducing the leakage and volatilization of the electrolyte.

[0051] The top of the positive electrode sheet 51 is connected to the positive electrode seat 53, and the top of the positive electrode seat 53 is provided with a positive electrode ear 531 extending to the top of the shell 1. The top of the negative electrode sheet 52 is connected to the negative electrode seat 54, and the top of the negative electrode seat 54 is provided with a negative electrode ear 541 extending to the top of the shell 1. The positive electrode ear 531 and the negative electrode ear 541 are conveniently connected to the power supply circuit.

[0052] like Figure 3 and Figure 5 As shown, a gel film 6 is arranged between the surface of the electrode sheet 5 and the liquid absorption seat 4. The gel film 6 is made of polymer gel material, specifically sodium polyacrylate gel material. The sodium polyacrylate gel material can absorb and retain a large amount of electrolyte, thereby reducing the loss of electrolyte during long-term use of the battery. At the same time, the gel film 6 is arranged between the liquid absorption seat 4 and the electrode sheet 5 as a liquid absorbent, which can improve the wettability of the electrolyte to the positive electrode sheet 51 and the negative electrode sheet 52, contribute to the efficient transmission of ions between the positive and negative electrodes, and further improve the ionic conductivity and cycle performance of the battery.

[0053] The electrode sheet 5, gel film 6 and heat dissipation film 7 are integrally formed to ensure uniform compounding of the electrode sheet 5, gel film 6 and heat dissipation film 7, and ensure good contact between the electrode sheet 5 and the gel film 6 and heat dissipation film 7 during bending, thereby ensuring the wetting effect and heat dissipation effect on the electrode sheet 5.

[0054] After the electrode sheet 5 is continuously bent, there is a gap between adjacent surfaces of the heat dissipation film 7 , the width of the gap is 0.1-0.5 mm, and the electrolyte can be filled into the gap to facilitate the contact between the electrode sheet 5 and the ions.

[0055] like Figure 7 As shown, the heat dissipation film 7 is composed of a heat-conducting layer 71, an inner isolation layer 72 and an outer isolation layer 73. The inner isolation layer 72 is arranged between the heat-conducting layer 71 and the surface of the electrode sheet 5, and the outer isolation layer 73 is arranged on the outside of the heat-conducting layer 71. The heat-conducting layer 71 is composed of a composite material of carbon nanotubes and copper powder, so that the heat dissipation film 7 has good thermal conductivity and heat dissipation performance. The inner isolation layer 72 and the outer isolation layer 73 are both composed of zirconia ceramic material, so that while ensuring the thermal conductivity and heat dissipation performance of the heat dissipation film 7, the heat dissipation film 7 has higher electrochemical stability, thereby improving the safety performance of the battery.

[0056] like Figure 2 and Figure 6 As shown, heat sinks 8 are embedded on the left and right inner walls of the shell 1, and the heat sink 8 is in contact with the surface of the heat sink film 7. The heat sink 8 and the heat sink film 7 cooperate with each other to facilitate the heat diffusion near the positive and negative electrodes inside the shell 1, thereby improving the heat dissipation effect inside the battery.

[0057] Four-pointed star-shaped grooves 15 are provided on the front and rear side walls of the shell 1, and heat dissipation bars 16 are provided on the outer side of the grooves 15 and are distributed symmetrically with the center. The heat dissipation bars 16 are integrally formed with the shell 1. The grooves 15 and the heat dissipation bars 16 cooperate with each other to improve the contact effect between the shell 1 and the air in a closed environment, and facilitate the flow of air on the outer surface of the shell 1, thereby improving the heat dissipation effect of the battery.

[0058] like Figure 1-Figure 8 As shown, a protective cover 9 is also provided on the top of the shell 1, and fixing grooves 91 are provided at the bottom of the protective cover 9 and near the four corners, and fixing blocks 14 are provided on the top of the shell 1 and near the four corners. The fixing grooves 91 and the fixing blocks 14 are mutually engaged, and arc plates 13 are provided on the top of the shell 1 and on the outside of the positive ear 531 and the negative ear 541. A wiring cavity 92 is provided on the protective cover 9 and on the outside of the arc plate 13. The wiring cavities 92 on the left and right sides are connected to each other. When multiple batteries are used in series, it is convenient to comb the wiring. The front and rear side walls of the protective cover 9 are provided with outlets 93 connected to the wiring cavity 92.

[0059] When the battery is in use, the positive ear 531 and the negative ear 541 need to be connected to the external circuit. After the power supply circuit is connected, the circuit can be sorted and controlled through the protective cover 9 and the wiring cavity 92 and the outlet 93 provided on the protective cover 9 to avoid the circuit being messy. At the same time, the wiring part and the circuit can be protected above the shell 1 to improve the power supply stability.

[0060] In addition, the present invention also provides a battery module, which is composed of a plurality of batteries distributed in an array, and each battery is connected in series. When the batteries are combined into a battery module, a plurality of heat dissipation strips 16 on adjacent shells 1 cooperate with each other to form an air flow channel. When the battery module is powered, the external flowing air can flow along the air flow channel between adjacent shells 1, and is guided and diffused by the air flow channel, so that the heat between the adjacent shells 1 is discharged, thereby improving the heat dissipation effect of the battery module during use.

[0061] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A battery, characterized in that: include: A shell (1), wherein a ceramic base (11) is embedded on the inner bottom wall of the shell (1), a diffusion seat (2) is arranged above and near the center of the ceramic base (11), and a receiving cavity (21) is arranged on the inner side of the diffusion seat (2), wherein the receiving cavity (21) is used to receive an electrolyte, and the electrolyte is evenly diffused on the diffusion seat (2); A liquid suction seat (4), the liquid suction seat (4) being centrally symmetrically arranged on both sides of the diffusion seat (2), a diaphragm (3) being arranged between the liquid suction seat (4) and the diffusion seat (2), and a plurality of evenly distributed pole piece grooves (41) being arranged on a side of the liquid suction seat (4) away from the diffusion seat (2); An electrode sheet (5), wherein the electrode sheet (5) is a continuously bent integral structure, and the surface of the electrode sheet (5) is in uniform contact with the inner surface of the electrode sheet groove (41) after being bent, the electrode sheet (5) is composed of a positive electrode sheet (51) and a negative electrode sheet (52), the positive electrode sheet (51) is connected to the liquid suction seat (4) on the right, and the negative electrode sheet (52) is connected to the liquid suction seat (4) on the left, and a heat dissipation film (7) is provided on the side of the electrode sheet (5) away from the liquid suction seat (4); A protective cover (9) is arranged above the shell (1) and is clamped and fixed to the top of the shell (1).

2. The battery according to claim 1, characterized in that: Two groups of parallel strip edges (111) are arranged at the top center of the ceramic base (11), and the strip edges (111) are snap-fitted with the bottom edge of the diffusion seat (2). The top of the shell (1) is provided with a liquid injection port (12) connected to the accommodating cavity (21), and a sealing cover (121) is connected above the liquid injection port (12).

3. The battery according to claim 1, characterized in that: The top of the diffusion seat (2) contacts the inner top wall of the shell (1), and upper liquid absorbing pads (42) are provided on both sides of the diffusion seat (2) and above the liquid absorbing seat (4), and the upper liquid absorbing pads (42) on the left and right sides are centrally symmetrically distributed.

4. The battery according to claim 3, characterized in that: The diffusion seat (2), the liquid absorbing seat (4) and the upper liquid absorbing pad (42) are all made of three-dimensional porous materials, and the electrolyte is gradually and evenly diffused along the diffusion seat (2) to the liquid absorbing seat (4) and the upper liquid absorbing pad (42).

5. The battery according to claim 1, characterized in that: The top of the positive electrode sheet (51) is connected to the positive electrode seat (53), and the top of the positive electrode seat (53) is provided with a positive electrode ear (531) extending to the top of the shell (1); the top of the negative electrode sheet (52) is connected to the negative electrode seat (54), and the top of the negative electrode seat (54) is provided with a negative electrode ear (541) extending to the top of the shell (1).

6. The battery according to claim 1, characterized in that: A gel film (6) is arranged between the surface of the electrode sheet (5) and the liquid suction seat (4); the gel film (6) is made of a polymer gel material; the electrode sheet (5), the gel film (6) and the heat dissipation film (7) are integrally formed; and after the electrode sheet (5) is continuously bent, a gap is provided between adjacent surfaces of the heat dissipation film (7); the width of the gap is 0.1-0.5 mm.

7. The battery according to claim 1, characterized in that: The heat dissipation film (7) is composed of a heat-conducting layer (71), an inner isolation layer (72) and an outer isolation layer (73); the inner isolation layer (72) is arranged between the heat-conducting layer (71) and the surface of the electrode sheet (5); and the outer isolation layer (73) is arranged on the outside of the heat-conducting layer (71).

8. The battery according to claim 1, characterized in that: The left and right inner walls of the shell (1) are both embedded with heat dissipation plates (8), the heat dissipation plates (8) are in contact with the surface of the heat dissipation film (7), the front and rear side walls of the shell (1) are both provided with four-pointed star-shaped grooves (15), the outer side of the groove (15) is provided with heat dissipation strips (16) distributed in a centrally symmetrical manner, and the heat dissipation strips (16) are integrally formed with the shell (1).

9. The battery according to claim 1, characterized in that: An arc-shaped plate (13) is provided on the top of the shell (1) and on the outer sides of the positive electrode ear (531) and the negative electrode ear (541); a fixing block (14) is provided on the top of the shell (1) and near the four corners; a fixing groove (91) is provided on the bottom of the protective cover (9) and near the four corners; the fixing groove (91) and the fixing block (14) are mutually engaged; a wiring cavity (92) is provided on the protective cover (9) and on the outer side of the arc-shaped plate (13); the wiring cavities (92) on the left and right sides are connected to each other; and a wire outlet (93) connected to the wiring cavity (92) is provided on the front and rear side walls of the protective cover (9).

10. A battery module, comprising the battery according to any one of claims 1 to 9, characterized in that: The battery module is composed of a plurality of batteries distributed in an array, and the batteries are connected in series. When the batteries form the battery module, a plurality of heat dissipation strips (16) on adjacent shells (1) cooperate with each other to form an air flow channel.

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