CN218896699U - Battery cell - Google Patents

Abstract

The utility model discloses a battery, comprising: the shell is internally provided with an installation space, and is provided with an opening and a plurality of heat dissipation air inlets; the plurality of electric cores are sequentially arranged in the installation space along the first direction; the main air pipe is arranged in the installation space and extends along the first direction, one end of the main air pipe is arranged in the opening and provided with a main air outlet, the side end of the main air pipe, which is close to the battery cell, is provided with a main air inlet, a sealing ring is arranged between the main air pipe and the battery cell, and the main air inlet is positioned in an area surrounded by the sealing ring; an auxiliary air pipe is arranged between any two adjacent electric cores, each auxiliary air pipe is provided with an auxiliary air inlet and an auxiliary air outlet, the auxiliary air outlet corresponds to the main air inlet, and the auxiliary air inlet corresponds to the heat dissipation air inlet; the exhaust fan is arranged in the main air outlet. The battery can effectively inhibit the loss and the random phenomenon of natural wind, improve the utilization efficiency of the natural wind, balance the temperature of the battery during charging and discharging, and inhibit the thermal runaway heat spreading of the battery.

Description

Battery cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery.

Background

With the progress and development of technology in recent years, energy storage batteries are the focus of research, which promotes the development of high and new technology products, but also restricts the development of the industry. The energy of the mobile scientific and technological products is mostly provided by batteries from mobile phones to electric cars to power stations and even spaceflight, the technical iteration cycle of the appearance design, control programs, functions, performances and the like of the scientific and technological products is very fast in recent years, and the development of energy core batteries is relatively slow, so that the energy core batteries become one of development factors which obstruct the large-scale energy storage and automobile industry at present. With the continuous optimization of the functions and performances of electronic products, higher-quality electric energy supply is required, so that the energy density of the energy storage battery is increasingly required in the industry in recent years. As the energy density, i.e., the capacity, of the battery is continuously increased, more heat is generated during charging and discharging, which is more difficult to control, thus providing new challenges for the cooling system of the energy storage system.

The most adopted air cooling system in the industry is the air cooling system which is mature in technology and relatively more advantageous in cost. Through installing a ventilation harmonica pipe between the batteries, convection heat exchange is formed by adopting an air draft or blowing mode, and heat generated by the batteries during operation is rapidly conducted out; and meanwhile, the main air pipe is arranged, so that heat generated by the battery is rapidly discharged through the main air pipe. According to the scheme, the temperature rise of the battery during operation can be effectively controlled, the battery is controlled in a reasonable temperature threshold, meanwhile, the temperature difference of the battery in the plug-in box can be reduced, the performance consistency of the battery is improved, and the cycle service life of the battery is further prolonged. However, the main air pipe is not subjected to sealing treatment, so that the control of the distribution state of the air speed is weaker, the soaking of the batteries is not facilitated, and the temperature difference between the batteries is increased. Therefore, designing a structural air pipe capable of controlling wind speed distribution and applying the structural air pipe to an air-cooled plug box product has become a problem to be solved in the development of the current energy storage industry.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery to solve the problems of weak control of wind speed distribution state, adverse battery soaking and temperature difference between batteries in the prior art.

A battery according to an embodiment of the present utility model includes: the shell is internally provided with an installation space, and is provided with an opening and a plurality of heat dissipation air inlets; the plurality of electric cores are sequentially arranged in the installation space along the first direction; the main air pipe is arranged in the installation space and extends along the first direction, one end of the main air pipe is arranged in the opening and provided with a main air outlet, the side end of the main air pipe, which is close to the battery cell, is provided with a main air inlet, a sealing ring is arranged between the main air pipe and the battery cell, and the main air inlet is positioned in an area surrounded by the sealing ring; the auxiliary air pipes are arranged between any two adjacent battery cells, each auxiliary air pipe is provided with an auxiliary air inlet and an auxiliary air outlet, the auxiliary air outlet corresponds to the main air inlet, and the auxiliary air inlet corresponds to the heat dissipation air inlet; and the exhaust fan is arranged in the main air outlet.

According to the battery provided by the embodiment of the utility model, the sealing ring is arranged between the main air pipe and the battery core, and the main air inlet is positioned in the area surrounded by the sealing ring, so that the loss and the mess of natural wind can be effectively inhibited, the utilization efficiency of the natural wind is improved, the temperature of the battery during charging and discharging is balanced, and the thermal runaway heat spreading of the battery is inhibited.

In some embodiments, the opening and the main air outlet are located at one end of the first direction.

In some embodiments, the primary intake includes: the first air inlet is close to the main air outlet; the second air inlet is far away from the main air outlet; the third air inlet is arranged between the first air inlet and the second air inlet, and the height of the third air inlet is smaller than that of the first air inlet and the second air inlet.

In some embodiments, the height of the third air inlet gradually decreases toward the main air outlet.

In some embodiments, the auxiliary air duct comprises a heat conducting metal body and an insulating film, wherein the insulating film is coated on the heat conducting metal body.

In some embodiments, a plurality of air cavities are formed in the auxiliary air pipe, the air cavities extend along the length direction of the auxiliary air pipe, one end of each air cavity is communicated with the auxiliary air inlet, and the other end of each air cavity is communicated with the auxiliary air outlet.

In some embodiments, each of the heat dissipation air inlets includes a plurality of sub air inlets, and the number of the sub air inlets is equal to that of the air chambers and corresponds to one.

In some embodiments, further comprising: the first end plate is abutted against the battery cell at one end of the first direction; the second end plate is abutted against the battery cell at the other end of the first direction; the fixing belt is sleeved on the first end plate, the second end plate and the battery cell.

In some embodiments, the first end plate, the second end plate, the fixing belt, the auxiliary air pipe and the plurality of electric cores form a module, two modules are arranged on two sides of the main air pipe in the first direction.

In some embodiments, the first end plate, the second end plate, the fixing belt, the auxiliary air pipe and the plurality of electric cores form a module, the battery further comprises a wire harness plate, the wire harness plate is arranged on the module and extends along the first direction, and a plurality of temperature detection points are arranged on the wire harness plate.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a structure of a battery in an embodiment of the present utility model;

FIG. 2 is an enlarged view of section I of FIG. 1 in accordance with the present utility model;

FIG. 3 is a schematic view of a main duct of the present utility model;

fig. 4 is a schematic view of a partial structure of a battery in an embodiment of the present utility model;

FIG. 5 is a top view of FIG. 4 in accordance with the present utility model;

FIG. 6 is an enlarged view of section II of FIG. 5 in accordance with the present utility model;

FIG. 7 is a left side view of FIG. 4 in accordance with the present utility model;

FIG. 8 is an enlarged view of section III of FIG. 7 in accordance with the present utility model;

FIG. 9 is a top view of FIG. 1 of the present utility model;

FIG. 10 is a graph showing temperature change at 14 temperature detection points in an embodiment of the present utility model;

FIG. 11 is a graph showing the maximum temperature difference at the same time point in the embodiment of the present utility model.

Reference numerals:

100. a battery;

10. a housing; 101. a sub air inlet;

20. a battery cell; 201. a first end plate; 202. a second end plate; 203. a fixing belt;

30. a main air pipe; 301. a main air outlet; 302. a main air inlet; 3021. a first air inlet; 3022. a second air inlet; 3023. a third air inlet;

40. a seal ring;

50. an auxiliary air pipe; 501. a thermally conductive metal body; 5011. an auxiliary air inlet; 502. an insulating film;

60. an exhaust fan;

70. a harness plate; 701. a temperature detection point;

80、BMS。

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A battery 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 9.

As shown in fig. 1, 2 and 4, a battery 100 according to an embodiment of the present utility model includes: the device comprises a shell 10, a battery cell 20, a main air pipe 30, a sealing ring 40, an auxiliary air pipe 50 and an exhaust fan 60.

According to the battery 100 of the embodiment of the utility model, an installation space is arranged in the shell 10, and the shell 10 is provided with an opening and a plurality of heat dissipation air inlets; the plurality of battery cells 20 are sequentially arranged in the installation space along the first direction; the main air pipe 30 is arranged in the installation space and extends along the first direction, one end of the main air pipe 30 is arranged in the opening and provided with a main air outlet 301, the side end of the main air pipe 30, which is close to the battery cell 20, is provided with a main air inlet 302, a sealing ring 40 is arranged between the main air pipe 30 and the battery cell 20, and the main air inlet 302 is positioned in an area surrounded by the sealing ring 40; an auxiliary air pipe 50 is arranged between any two adjacent battery cells 20, each auxiliary air pipe 50 is provided with an auxiliary air inlet 5011 and an auxiliary air outlet, the auxiliary air outlet corresponds to the main air inlet 302, and the auxiliary air inlet 5011 corresponds to the heat dissipation air inlet; the suction fan 60 is provided in the main air outlet 301.

It can be understood that, referring to fig. 1 and fig. 5 to 8, the housing 10 is a rectangular parallelepiped structure with an installation space inside, and a heat dissipation air inlet is formed on a side surface of the housing 10. The exhaust fan 60 provides a power source, so that external wind enters the auxiliary air pipe 50 between the adjacent battery cells 20 from the heat dissipation air inlet, namely enters from the auxiliary air inlet 5011 and then is discharged from the auxiliary air outlet. Heat generated during charging and discharging of the battery 100 is taken away and collected into the main air duct 30 by utilizing the convection heat exchange principle, and finally discharged from the main air outlet 301. In this process, the sealing ring 40 is attached to the circumferential edge between the main air duct 30 and the electric core 20, so that the housing 10, the electric core 20 and the main air duct 30 are tightly combined, thereby effectively reducing the generation of useless air, improving the working efficiency of the exhaust fan 60, better balancing the temperature of the battery 100 during charging and discharging, improving the heat dissipation rate of the battery 100 to the environment, and improving the working rate of the battery 100. It should be noted that, the main air duct 30 may be made of plastic materials such as pc+abs/PA66+gf30/PA6+gf30/pp+gf20, so as to reduce cost, and may also play an insulating protection role, and the auxiliary air duct 50 may be a mouth organ.

According to the battery 100 of the embodiment of the utility model, the sealing ring 40 is arranged between the main air pipe 30 and the battery cell 20, and the main air inlet 302 is positioned in the area surrounded by the sealing ring 40, so that the loss and the random phenomenon of natural wind can be effectively inhibited, the utilization efficiency of the natural wind can be improved, the temperature of the battery 100 during charging and discharging can be balanced, and the thermal runaway and the thermal spread of the battery 100 can be inhibited.

In some embodiments, referring to fig. 1, the open and primary air outlet 301 is located at one end in the first direction. It will be appreciated that both the opening and the main air outlet 301 are located at the front end of the main air duct 30, so that the heat generated by the battery 100 is more removed. The "first direction" refers to the front-rear direction in fig. 1.

In some embodiments, referring to fig. 3, the primary air intake 302 includes a first air intake 3021, a second air intake 3022, and a third air intake 3023, the first air intake 3021 being proximate to the primary air outlet 301; the second air inlet 3022 is remote from the main air outlet 301; the third air inlet 3023 is disposed between the first air inlet 3021 and the second air inlet 3022, and the height of the third air inlet 3023 is smaller than the heights of the first air inlet 3021 and the second air inlet 3022. It will be appreciated that, on the side of the main duct 30, a first air inlet 3021, a third air inlet 3023 and a second air inlet 3022 are provided from front to back, and the first air inlet 3021 and the second air inlet 3022 at the front and back ends are provided at a higher height, so that the wind power at the corner position can be enhanced, and no flowing air at the corner can be prevented.

In some embodiments, referring to fig. 3, the height of the third air inlet 3023 decreases gradually toward the main air outlet 301. It can be understood that the height of the third inlet and outlet is gradually reduced from back to front, so that the stepped wind speed distribution generated by different distances from the exhaust fan 60 can be solved, the consistency of the wind speeds of the front and rear air inlets is improved, and the disturbance phenomenon converged in the main air duct is weakened.

In some embodiments, referring to fig. 4, the auxiliary duct 50 includes a heat conductive metal body 501 and an insulating film 502, and the insulating film 502 is coated on the heat conductive metal body 501. It can be understood that, during normal operation of the battery 100 system, the battery cells 20 release heat, and the auxiliary air duct 50 made of metal material is better in convection heat transfer performance than the auxiliary air duct made of plastic material between the battery cells 20; on the other hand, the surface of the heat conducting metal body 501 is wrapped with a layer of insulating film 502, which can play a certain role in insulation and protection of the battery 100. It should be noted that, the heat conductive metal body 501 may be made of 6061/6063 metal, so as to effectively improve heat conduction between the battery cell 20 and the auxiliary air duct 50 and enhance heat conductive efficiency. The insulating film 502 may be an insulating blue film.

In some embodiments, referring to fig. 4, a plurality of air cavities are formed in the auxiliary air duct 50, the air cavities extend along the length direction of the auxiliary air duct 50, and one end of each air cavity is communicated with the auxiliary air inlet 5011, and the other end is communicated with the auxiliary air outlet, so that the heat dissipation rate of the battery 100 is further improved. The term "longitudinal direction" refers to the vertical direction in fig. 4.

In some embodiments, referring to fig. 1, each heat dissipation air inlet includes a plurality of sub air inlets 101, and the number of sub air inlets 101 and air cavities is equal and corresponds to one another, so that resistance of natural wind entering the air cavities can be reduced, and material usage can be reduced.

In some embodiments, referring to fig. 1 and 2, the battery 100 further includes a first end plate 201, a second end plate 202, and a fixing strap 203, where the first end plate 201 abuts against the cell 20 at one end in the first direction; the second end plate 202 is abutted against the battery cell 20 at the other end of the first direction; the fixing strap 203 is sleeved on the first end plate 201, the second end plate 202 and the battery cell 20. It will be appreciated that the cells 20 will expand during operation and that the longer the operation time, the greater the expansion force, the more the strap 203 will be preloaded. The cell 20 is the best operating condition under the working condition that the pretightening force is 3000N. The first end plate 201 and the second end plate 202 serve to balance the pretightening force, fix the battery module, and protect the base from the positive and negative electrodes.

In some embodiments, referring to fig. 1, the first end plate 201, the second end plate 202, the fixing belt 203, the auxiliary air duct 50 and the plurality of electric cores 20 form two modules, and the two modules are arranged on two sides of the main air duct 30 in the first direction, so that heat dissipation is achieved for the two modules simultaneously, and heat dissipation efficiency of the battery 100 is improved.

In some embodiments, referring to fig. 1, the first end plate 201, the second end plate 202, the fixing belt 203, the auxiliary air duct 50 and the plurality of electric cells 20 form a module, and the battery 100 further includes a harness plate 70, where the harness plate 70 is disposed on the module and extends along the first direction, and a plurality of temperature detection points 701 are disposed on the harness plate 70. It will be appreciated that by providing the harness board 70, the voltage temperatures of the cells 20 can be pooled and collected.

In some embodiments, referring to fig. 1, a BMS 80 is provided on the housing 10. The BMS 80 is configured to collect the voltage and temperature of the battery cells 20, monitor the state of charge of each battery cell 20, and input the result to the next stage in the form of data, thereby providing a basis for remote control.

The utility model will now be described with reference to specific examples, which are intended to be illustrative only and not limiting in any way.

Examples

Referring to fig. 1-9, a specific embodiment of a battery 100 of the present utility model is described.

The battery 100 includes: the electric fan comprises a shell 10, a battery cell 20, a main air pipe 30, an auxiliary air pipe 50, a sealing ring 40, an exhaust fan 60, a first end plate 201, a second end plate 202, a fixing belt 203 and a wire harness plate 70.

The shell 10 is internally provided with an installation space, and the shell 10 is provided with an opening and a plurality of heat dissipation air inlets; twelve electric cores 20 are sequentially arranged in the installation space along the front-back direction; the main air pipe 30 is arranged in the installation space and extends along the front-rear direction, one end of the main air pipe 30 is arranged in the opening and is provided with a main air outlet 301, the side end of the main air pipe 30, which is close to the battery cell 20, is provided with a main air inlet 302, a sealing ring 40 is arranged between the main air pipe 30 and the battery cell 20, and the main air inlet 302 is positioned in an area surrounded by the sealing ring 40; an auxiliary air pipe 50 is arranged between any two adjacent battery cells 20, each auxiliary air pipe 50 is provided with an auxiliary air inlet 5011 and an auxiliary air outlet, the auxiliary air outlet corresponds to the main air inlet 302, and the auxiliary air inlet 5011 corresponds to the heat dissipation air inlet; the suction fan 60 is provided in the main air outlet 301. The first terminal plate 201 is abutted against the front end battery cell 20; the second end plate 202 is stopped against the rear end of the battery cell 20; the fixing strap 203 is sleeved on the first end plate 201, the second end plate 202 and the battery cell 20. The first end plate 201, the second end plate 202, the fixing belt 203, the auxiliary air pipe 50 and the twelve electric cores 20 form two modules, and the two modules are arranged on the left side and the right side of the main air pipe 30. An open and main air outlet 301 is located at the front end of the housing 10. The harness plate 70 is provided on the module and extends in the left-right direction, and fourteen temperature detection points 701 are provided on the harness plate 70.

The main air inlet 302 includes a first air inlet 3021, a second air inlet 3022, and a third air inlet 3023, where the first air inlet 3021 is close to the main air outlet 301; the second air inlet 3022 is remote from the main air outlet 301; the third air inlet 3023 is disposed between the first air inlet 3021 and the second air inlet 3022, and the height of the third air inlet 3023 is smaller than the heights of the first air inlet 3021 and the second air inlet 3022. The height of the third air inlet 3023 gradually decreases toward the main air outlet 301.

The auxiliary air duct 50 comprises a heat-conducting metal body 501 and an insulating film 502, and the insulating film 502 is coated on the heat-conducting metal body 501. Six air cavities are formed in the auxiliary air pipe 50, the air cavities extend along the left-right direction of the auxiliary air pipe 50, one end of each air cavity is communicated with the auxiliary air inlet 5011, and the other end of each air cavity is communicated with the auxiliary air outlet. Each heat dissipation air inlet comprises six sub air inlets 101, and the number of the sub air inlets 101 and the number of the air cavities are equal and correspond to each other one by one.

The battery obtained in the above example was subjected to an initial charge-discharge energy test at 25.+ -. 2 ℃ according to the following procedure:

(1) Placing for 10s;

(2) Discharging with constant power until Vmin is less than or equal to 2.8V;

(3) Standing for 10min;

(4) Charging with constant power until Vmax is more than or equal to 3.55V;

(5) Standing for 10min;

(6) Discharging with constant power until Vmin is less than or equal to 2.8V;

(7) Standing for 10min;

(8) Cycling steps (4) to (7) 2 times in total;

(9) Standing for 10min;

(10) And (5) ending.

In the charge and discharge test process, 14 temperature detection points are subjected to temperature monitoring, the positions of the temperature detection points are shown in fig. 9, and the temperature change curve of the temperature detection points is shown in fig. 10.

From the test results, the temperatures of the 14 temperature detection points are 32 to 37 ℃ as a whole, and the temperatures during charge and discharge are mainly concentrated at 33 to 36 ℃. In this temperature range, the charge-discharge efficiency of the battery is relatively high. Fig. 11 shows that the temperature difference between the detection points at the same time is not more than 3 ℃, and the result shows that the method can effectively balance the internal temperature of the shell, especially when the shell is in the final charging and placing working condition, the maximum temperature difference is only 1-2 ℃, and the discharging temperature difference, namely the maximum temperature difference when the battery works, is only 3 ℃, so that the temperature control effect of the scheme on the battery cells in the shell is good.

In the description of the present specification, reference to the terms "some embodiments," "optionally," "further," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery, comprising:

the shell (10) is internally provided with an installation space, and the shell (10) is provided with an opening and a plurality of heat dissipation air inlets;

the battery cells (20) are arranged in the installation space in sequence along the first direction, and the battery cells (20) are a plurality of;

the main air pipe (30) is arranged in the installation space and extends along the first direction, one end of the main air pipe (30) is arranged in the opening and provided with a main air outlet (301), a main air inlet (302) is formed in the side end, close to the battery cell (20), of the main air pipe (30), a sealing ring (40) is arranged between the main air pipe (30) and the battery cell (20), and the main air inlet (302) is located in an area surrounded by the sealing ring (40);

an auxiliary air pipe (50) is arranged between any two adjacent battery cells (20), the auxiliary air pipe (50) is provided with an auxiliary air inlet (5011) and an auxiliary air outlet, the auxiliary air outlet corresponds to the main air inlet (302), and the auxiliary air inlet (5011) corresponds to the heat dissipation air inlet;

and the exhaust fan (60) is arranged in the main air outlet (301).

2. The battery according to claim 1, wherein the opening and the main air outlet (301) are located at one end of the first direction.

3. The battery according to claim 2, wherein the main intake (302) comprises:

-a first air inlet (3021), the first air inlet (3021) being close to the main air outlet (301);

-a second air inlet (3022), the second air inlet (3022) being remote from the main air outlet (301);

the third air inlet (3023), the third air inlet (3023) is arranged between the first air inlet (3021) and the second air inlet (3022), and the height of the third air inlet (3023) is smaller than the height of the first air inlet (3021) and the height of the second air inlet (3022).

4. A battery according to claim 3, characterized in that the height of the third air inlet (3023) decreases gradually towards the main air outlet (301).

5. The battery according to claim 1, characterized in that the auxiliary air duct (50) comprises a heat conducting metal body (501) and an insulating film (502), the insulating film (502) being coated on the heat conducting metal body (501).

6. The battery according to claim 1, wherein a plurality of air cavities are formed in the auxiliary air duct (50), the air cavities extend along the length direction of the auxiliary air duct (50), one end of each air cavity is communicated with the auxiliary air inlet (5011), and the other end is communicated with the auxiliary air outlet.

7. The battery according to claim 6, wherein each of the heat dissipation air inlets includes a plurality of sub air inlets (101), and the number of sub air inlets (101) and the number of air chambers are equal and correspond to each other one by one.

8. The battery of claim 1, further comprising:

a first end plate (201), the first end plate (201) abutting against the battery cell (20) at one end of the first direction;

a second end plate (202), the second end plate (202) abutting against the battery cell (20) at the other end of the first direction;

the fixing belt (203) is sleeved on the first end plate (201), the second end plate (202) and the battery cell (20).

9. The battery according to claim 8, wherein the first end plate (201), the second end plate (202), the fixing band (203), the auxiliary air duct (50) and the plurality of electric cells (20) constitute two modules, and the two modules are provided on both sides of the main air duct (30) in the first direction.

10. The battery according to claim 8, wherein the first end plate (201), the second end plate (202), the fixing band (203), the auxiliary air duct (50) and the plurality of electric cells (20) form a module, the battery further comprises a wire harness plate (70), the wire harness plate (70) is arranged on the module and extends along the first direction, and a plurality of temperature detection points (701) are arranged on the wire harness plate (70).

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