CN114335751A - Power type polymer lithium ion battery monomer, battery pack and battery pack - Google Patents

Abstract

The invention provides a power type polymer lithium ion battery unit, a battery assembly and a battery pack. The power type polymer lithium ion battery unit of the present invention includes a battery body, the battery body is formed by stacking battery cells, the positive and negative electrodes of the battery core are provided with more than two sets of positive and negative current-conducting tabs, and the positive and negative electrodes are conductive. The flow tab is located on the top surface of the cell in the height direction, and the battery body is sealed and encapsulated by an aluminum-plastic composite film. The height H is greater than the thickness D, the width L is 600-2600mm, and L/H=7-35. The battery cell and the battery pack of the invention have strong fast charge and discharge capability, and the battery cell generates less heat, which is favorable for the overall arrangement in the battery pack, improves the space utilization rate of the battery pack, and expands the energy density and energy density of the battery pack. Power density, which in turn enhances battery pack endurance, safety performance and service life.

Description

A power polymer lithium ion battery cell, battery assembly and battery pack

technical field

The present invention relates to the technical field of batteries, in particular to a power type polymer lithium ion battery cell, a battery assembly and a battery pack.

Background technique

At present, the power battery cells of the polymer soft packaging shell structure used in electric vehicles are basically connected by a single set of positive and negative current diversion tabs. It will be greatly restricted, and even lead to overheating, leakage and even short circuit of the battery cell tabs during long-term use of the battery, which will lead to battery safety accidents and greatly affect the promotion and application of batteries in the field of electric vehicles. .

A power battery pack applied to an electric vehicle mainly includes a pack body and a plurality of battery modules installed in the pack body, and each battery module is assembled from a plurality of single cells. Due to the limitation of internal resistance and overcurrent of the battery, the size of the single battery is generally not designed to be too large. The size of the battery is small and the width is short, and the opposite ends of the single cell cannot be matched with the two side beams arranged oppositely in the battery pack, so cross beams and/or longitudinal beams need to be provided in the accommodating device to facilitate the assembly of the single battery.

As the user's requirements for the battery life of electric vehicles gradually increase, in the case of limited space at the bottom of the vehicle body, the power battery pack with the above structure will reduce the utilization rate of the internal space of the pack body, resulting in the volume of the single battery in the power battery pack. The ratio of the sum to the volume of the package is too low, and the energy density cannot meet the user's demand for the battery life of electric vehicles, which has gradually become an important factor restricting the development of electric vehicles.

CN 111834567 A discloses a battery module including super-wide battery cells, which comprises: battery cells connected with a plurality of electrode joints at both ends; a battery stack formed by stacking the battery cells; bus bar assemblies at both ends formed by At both ends of the battery stack, the electrode joints of a plurality of battery cells are electrically connected; the transverse bus bar assembly is used to electrically connect the electrode contacts at both ends of the battery cells arranged at the uppermost or lowermost end of the battery stack; and a case housing the battery stack, the bus bar assemblies at both ends and the lateral bus bar assemblies. The above-mentioned battery module can improve the current output capability of the polymer battery to a certain extent when the length of the battery cell does not exceed 600mm. The effective space utilization rate is low, which greatly reduces the volume energy density, weight energy density and battery group efficiency of the battery pack, which is not conducive to the application and promotion of polymer lithium-ion batteries.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a power-type polymer lithium-ion battery cell, a battery assembly and a battery pack. Problems such as heat generation improve the space utilization rate of the battery pack, expand the energy density and charge-discharge power density of the battery pack, and further enhance the battery pack's endurance and safety performance.

The invention provides a power type polymer lithium ion battery cell (referred to as a battery cell for short), which comprises three parts: a battery body, positive and negative electrodes, and an aluminum-plastic composite film shell. The battery body is formed by stacking battery cells. The positive and negative electrodes of the battery cell have more than two sets of positive and negative current guide tabs, the positive and negative current guide tabs are located on the top surface of the cell in the height direction, and the battery body is sealed and packaged by an aluminum-plastic composite film. The power type polymer lithium ion battery has a width L, a height H and a thickness D, wherein the width L is greater than the height H, the height H is greater than the thickness D, the width L is 600-2600mm, and L/H=7-35.

The internal cell assembly method of the battery cell of the present invention adopts a lamination process, and the positive and negative electrodes have more than two sets of positive and negative current guide tabs, and the positive and negative current guide tabs are located on the top surface of the cell in the height direction. , and are symmetrically distributed on both sides of the top of the battery cell, which is beneficial to the series combination of the battery cells in the later stage; the positive and negative electrode pieces of the battery cell and the positive and negative current guide tabs are welded together by an ultrasonic welding machine or a laser welding machine. High temperature resistant insulating spacers are attached on both sides of the welding point to prevent uneven heating of the cell or burrs pierce the aluminum-plastic composite film and cause internal short circuit. The high temperature insulating spacers can be made of polypropylene (PP), poly One or more of the insulating materials insoluble in electrolyte such as ethylene (PE) and polyimide (PI) are used in combination; the shell material of the battery body is made of aluminum-plastic composite film, and the battery cell body is made of aluminum-plastic composite film. The composite film is sealed and encapsulated by heating and pressure, and the positive and negative current-conducting tabs and the aluminum-plastic composite film are heat-sealed together.

It can be understood that a bus bar is also included, and the power type polymer lithium ion battery cells are connected through the bus bar; in the present invention, the bus bar is welded with the positive and negative current guide tabs to connect the power type polymer lithium ion battery cells in series. connect. More specifically, the series connection and voltage collection of the battery cells can be realized by welding the positive and negative current-conducting tabs and the bus bar together by means of laser welding.

In the present invention, the number of groups of positive and negative current-conducting tabs can be determined according to the width of the battery cell. Generally, a set of positive and negative current-conducting tabs can be arranged at a width of 250-400 mm. That is, the distance between the positive and negative current-guiding tabs of adjacent same poles is 250-400 mm, preferably 300-350 mm.

The battery cell of the invention has strong rapid charge and discharge capability, and the battery cell itself generates less heat, which is beneficial to the overall arrangement of the battery cell in the battery pack, thereby improving the space utilization rate of the battery pack and expanding the energy of the power battery pack. Density and power density, thereby enhancing the endurance, safety performance and service life of the power battery pack.

The present invention also provides a power-type polymer lithium-ion battery cell assembly (referred to as a battery cell assembly for short), comprising an I-shaped plastic frame and two of the above-mentioned power-type polymer lithium-ion battery cells, two power-type polymer lithium-ion battery cells. The polymer lithium-ion battery cell is relatively fixed on both sides of the center plate of the I-shaped plastic frame, and an elastic insulating heat shield is provided on the outside of the power-type polymer lithium-ion battery cell. The power-type polymer lithium-ion battery cell The inner side is fixed on the center plate of the I-shaped plastic frame by thermal adhesive.

Further, the I-shaped plastic frame is provided with a plurality of fixing holes for fixing the power polymer lithium ion battery cell assembly into a battery cell array. The location and number of the fixing holes are not strictly limited, and can be reasonably arranged according to actual needs. For example, more than four fixing holes can be arranged.

In particular, a heating element is arranged on the center plate of the I-shaped plastic frame, and the heating element can heat the power-type polymer lithium-ion battery cell when the temperature of the power-type polymer lithium-ion battery cell is lower than the set temperature. heating. This method can ensure that the battery works within a reasonable temperature range, thereby improving the service life and endurance of the battery cell and the battery pack.

The power-type polymer lithium-ion battery cell assembly of the present invention utilizes an I-shaped plastic frame to assemble the two above-mentioned power-type polymer lithium-ion battery cells together. One side is fixed and insulated with thermally conductive adhesive and the center plate of the I-shaped plastic frame to form a battery cell assembly; the center plate of the I-shaped plastic frame in the battery cell assembly is provided with a heating component, and the heating component and the center plate can be combined. The second is an integrated setting, and the temperature of the battery cell is adjusted by the temperature control method of heating the large surface of the battery cell; The fixing holes are combined and fastened to form a battery array; the formed battery array is placed in the package body of the battery pack, and is fixed to the package body by connecting screws and fixing components.

The present invention also provides a battery pack, including a pack body and a battery cell array, wherein the battery cell array includes a plurality of the above-mentioned power-type polymer lithium-ion battery cell assemblies, and the plurality of power-type polymer lithium-ion battery cell assemblies pass through The fixing member is fixed into a battery cell array, a placement area is arranged in the package body, and the battery cell array is fixedly placed in the placement area of the package body.

It can be understood that a fixing member can be provided in the battery pack of the present invention, and the battery cell array can be fixed on the fixing member; more specifically, the battery cell array can be placed on the bottom support member of the battery pack, and the battery cell array can be The single battery assembly, the array fixing member and the battery pack busbar are fastened together.

In the present invention, the direction of the two parallel planes corresponding to the width L direction of the battery cells is set as the Q direction, a placement area is formed in the package, the battery cell array is located in the placement area, and the battery cell assemblies are located along the Q direction from one side of the placement area. side extends to the other side of the drop zone. The battery pack of the present invention forms a battery array through a plurality of long battery cell assemblies, which improves the battery capacity of the battery pack, and at the same time adopts a width L of a specific range to improve the space utilization rate of the battery pack.

The battery pack of the present invention includes a temperature control system, and the setting idea of the temperature control system is as follows: the temperature control method of heating the large surface of the battery cell is used to adjust the temperature of the battery cell, and at the same time, the temperature of the battery cell array that is most prone to heat or heat is concentrated. The positive and negative current-conducting tabs of the thermally conductive battery cells are used for temperature control. At this time, the temperature control system can be arranged on the top of the battery cell array to cool the positive and negative current guide tabs, and an elastic insulating and thermally conductive rubber pad is provided between the temperature control system and the battery cell array.

In addition, an elastic thermal conductive silicone sheet can be arranged between the battery cell array in the battery pack and the top support of the battery pack, which can conduct heat when the battery cell array is overheated or the temperature is too low, and the temperature of the battery pack is always controlled at The right range to improve battery pack life and cruising range. The temperature control system arranged on the top of the battery cell array can be integrated with the top of the support member on the top of the battery pack, and the heat conduction medium of the temperature control system can be a conventional medium such as liquid or gas.

In the present invention, the battery pack only allows the battery cells to participate in the series connection in a collective manner when the battery cells are combined in series; The role of current fuse and protection functions.

In the present invention, the battery cell array may be a square-shaped battery cell array, and the square-shaped battery cell array is arranged along the thickness direction of the power-type polymer lithium-ion battery cells. The number of battery cell arrays 14 may be one array or two arrays, and the number of the battery cell arrays 14 may not exceed two arrays at most.

Further, a reserved space can be set between the package body and the battery cell array for safety buffering; at the same time, the temperature control system is provided with a temperature acquisition system for collecting the temperature of the power-type polymer lithium-ion battery cells, At this time, the current connection wire, the voltage collection wire and the temperature collection system can be arranged in the reserved space; more specifically, the current connection wire, the voltage collection wire and the temperature collection system and the connection wire of the central plate heating component of the plastic structure frame can be arranged In the small-sized space of the structure protruding from the fixing holes of the single component on both sides of the width of the battery cell array, it is then centrally fixed through the insulated wire groove.

In the battery pack of the present invention, the structural material may adopt one or more combinations of lightweight materials such as pure aluminum, aluminum alloy, aluminum profile, engineering plastic, and basalt fiber material.

The battery pack of the invention has strong fast charging and discharging capability, and the battery cell generates less heat, and can completely solve the problems of high internal resistance and body heating of the ultra-long battery; Make full use of the safety buffer space reserved between the package body structure and the two sides of the battery cell array, which is conducive to the overall arrangement in the battery pack, thereby improving the space utilization rate of the battery pack and expanding the energy of the battery pack Density and charge-discharge power density, thereby enhancing the battery pack's endurance and safety performance; at the same time, the battery pack cancels the internal parallel mode of the battery, and only adopts multiple series structure design, which is conducive to improving the consistency of battery cells. The battery pack of the present invention is a non-module CTP structure battery pack, which is especially suitable for the CTC design scheme, that is, the structure design scheme in which the battery pack and the electric vehicle chassis are integrated into one.

The implementation of the present invention has at least the following advantages:

1) The power-type polymer lithium ion battery of the present invention has more than two sets of positive and negative current guide tabs, and the positive and negative current guide tabs are located on the top surface of the cell in the height direction, and have high structural safety performance, It has the advantages of strong heat dissipation capability and good fast charging and discharging capability;

2) The power-type polymer lithium-ion battery of the present invention has low internal resistance, so less heat is generated, which can completely solve the problems of high internal resistance and body heating of the ultra-long battery, and is beneficial to the battery in the battery pack. The overall arrangement of the battery pack can improve the space utilization of the battery pack, expand the energy density and power density of the battery pack, and then enhance the battery pack's battery life;

3) The preparation process of the battery cell and the battery pack of the present invention is simple and feasible, and can realize large-scale production; the battery cell and the battery pack have high volume energy density and volume utilization rate, and are a non-module CTP structure battery It is especially suitable for the CTC design scheme, that is, the structural design scheme in which the battery pack and the chassis of the electric vehicle are integrated.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a battery cell according to the present invention;

2 is a schematic structural diagram of the I-shaped plastic frame according to the present invention;

Fig. 3 is the external structure diagram of the I-shaped plastic frame of the present invention;

4 is a top view of the I-shaped plastic frame according to the present invention;

5 is a schematic structural diagram of the bus bar according to the present invention;

6 is an external structural diagram of the battery pack according to the present invention;

7 is an exploded view of the battery pack according to the present invention;

8 is a top view of the battery pack according to the present invention;

9 is a schematic structural diagram of the temperature control system according to the present invention;

10 is a schematic structural diagram of the wireless charging induction coil assembly according to the present invention;

Description of reference numbers:

1. Battery body; 2. Positive and negative current guide tabs; 3. I-shaped plastic frame; 4. Elastic insulating heat shield; 5. Thermal adhesive; 6. Fixing hole; 7. Bus bar; 8. Battery pack ;9, upper cover; 10, box body; 11, temperature control system; 12, elastic thermal conductive silicone sheet; 13, insulated wire groove; 14, battery cell array; 15, sealing strip; 16, wireless charging induction coil assembly; 17. Through holes.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular also includes the plural unless the context clearly dictates otherwise, and it should also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and/or combinations thereof.

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

With reference to Figures 1-10, the structures of the power-type polymer lithium-ion battery cells, battery cell assemblies, and battery packs 8 in each embodiment are as follows:

1) Power polymer lithium-ion battery cell

The power type polymer lithium ion battery cell consists of three parts: the battery body 1, the positive and negative current diversion tabs 2 and the aluminum-plastic composite film shell. The battery body 1 is formed by stacking the cells. There are more than two groups of positive and negative current guide tabs 2, the positive and negative current guide tabs 2 are located on the top surface of the cell in the height direction, and the battery body 1 is sealed and packaged by an aluminum-plastic composite film. The battery cell has a width L, a height H and a thickness D, wherein the width L is greater than the height H, the height H is greater than the thickness D, the width L is 600-2600 mm, and L/H=7-35.

The above-mentioned internal cell assembly method of the battery cell adopts the lamination process, and more than two groups of positive and negative current guide tabs 2 can be symmetrically distributed on both sides of the top surface in the height direction of the cell, which is conducive to the series connection of the battery cells in the later stage. Combination; welded together by ultrasonic welding machine or laser welding machine, and high temperature resistant insulating spacers are attached to both sides of the welding point to prevent uneven heating of the cell or burr piercing the aluminum-plastic composite film to cause internal short circuit phenomenon. , The high temperature resistant insulating spacer can be mixed with one or more of the insulating materials of polypropylene (PP), polyethylene (PE), polyimide (PI) and other electrolyte-insoluble materials; the shell material is made of aluminum plastic Composite film, the battery cell body is sealed and packaged by aluminum-plastic composite film through heating and pressure, and the positive and negative current guide tabs 2 and the aluminum-plastic composite film are heat-sealed together.

The power-type polymer lithium-ion battery cell also includes a bus bar 7, which is welded with the positive and negative current guide tabs 2 to connect the power-type polymer lithium-ion battery cell in series; The pole current-conducting tabs 2 and the busbars 7 are welded together to realize the series connection and voltage collection of the battery cells.

The number of groups of positive and negative current guide tabs 2 can be determined according to the width of the battery cell. Generally, a set of positive and negative current guide tabs 2 can be set at a width of 250-400mm; The spacing between the current tabs 2 is 250-400 mm, and preferably, a group of positive and negative current-guiding tabs 2 are arranged at intervals of 300-350 mm in width.

The above-mentioned battery cells have strong fast charge and discharge capabilities, and the battery cells themselves generate less heat, which is conducive to the overall arrangement in the battery pack 8, thereby improving the space utilization rate of the battery pack 8, and expanding the energy density and energy density of the power battery pack 8. power density, thereby enhancing the endurance, safety performance and service life of the power battery pack 8.

2) Power polymer lithium-ion battery unit components

The power-type polymer lithium-ion battery cell assembly includes an I-shaped plastic frame 3 and two of the above-mentioned power-type polymer lithium-ion battery cells, and the two power-type polymer lithium-ion battery cells are relatively fixed on the I-shaped plastic frame. On both sides of the center plate of the frame 3, elastic insulating heat shields 4 are arranged on the outside of the power-type polymer lithium-ion battery cell, and the inner side of the power-type polymer lithium-ion battery cell is insulated and fixed on the I-shaped by thermal conductive glue 5. The center plate of the plastic frame 3.

The I-shaped plastic frame 3 is provided with a plurality of fixing holes 6 for fixing the power polymer lithium-ion battery cell assembly into the battery cell array 14 . The location and number of the fixing holes 6 are not strictly limited, and can be reasonably arranged according to actual needs. For example, more than four fixing holes 6 can be arranged.

A heating element is arranged on the center plate of the I-shaped plastic frame 3, and the heating element can heat the power-type polymer lithium-ion battery cell when the temperature of the power-type polymer lithium-ion battery cell is lower than the set temperature. This method can ensure that the battery works within a reasonable temperature range, thereby improving the service life and endurance of the battery cell and the battery pack 8 .

The top of the I-shaped plastic frame 3 is provided with a plurality of through holes 17 for the positive and negative current conducting tabs 2 to pass through.

The above-mentioned power-type polymer lithium-ion battery cell assembly uses an I-shaped plastic frame 3 to assemble two of the above-mentioned power-type polymer lithium-ion battery cells together. One side is fixed and insulated with thermally conductive adhesive 5 and the center plate of the I-shaped plastic frame 3 to form a battery cell assembly; in the battery cell assembly, the center plate of the I-shaped plastic frame 3 is provided with a heating component, and the heating component is connected to the center plate of the I-shaped plastic frame 3. The plates can be combined into one integrated set, and the temperature of the battery cells can be adjusted by heating the large surface of the battery cells; the battery cell components can be set on the I-shaped plastic frame 3 through fixing parts such as connecting screws The four or more fixing holes 6 of the battery pack are combined and fastened to form a battery array; the formed battery array is placed in the body of the battery pack 8 and fixed with the body by connecting screws and fixing components.

3) Battery pack 8

The battery pack 8 includes a pack body and a battery cell array 14. The battery cell array 14 includes a plurality of the above-mentioned power-type polymer lithium-ion battery cell assemblies, and the plurality of power-type polymer lithium-ion battery cell assemblies are fixed by fixing parts. The battery cell array 14 is provided with a placement area in the package body, and the battery cell array 14 is fixedly placed in the placement area of the package body.

In the battery pack 8 of the present invention, a fixing member may be provided, and the battery cell array 14 may be fixed on the fixing member; 14 can be fastened together by the single battery assembly, the array fixing member and the bus bar 7 of the battery pack 8 .

The battery cell array 14 is placed in the box body 10 of the battery pack 8 , the upper cover 9 is provided above the battery pack 8 , the sealing strip 15 is arranged around the top of the box body 10 , and the battery cell array 14 is arranged at the bottom of the box body 10 . The wireless charging induction coil assembly 16 connected to the battery charging and discharging control system on the battery is used in conjunction with the wireless charger.

The direction of the two parallel planes corresponding to the L direction of the battery cell width is set as the Q direction, and a placement area is formed in the package. The battery cell array 14 is located in the placement area. Extend to the other side of the placement area; the above-mentioned battery pack 8 forms a battery array through a plurality of long battery cell assemblies, which improves the battery capacity of the battery pack 8, and at the same time adopts a specific range of width L, which improves the space utilization of the battery pack 8 Rate.

The battery pack 8 also includes a temperature control system 11 , and the setting idea of the temperature control system 11 is as follows: the temperature control method of heating the large surface of the battery cell is used to adjust the temperature of the battery cell, and at the same time, it focuses on the most easy-to-use battery cell array 14 . The positive and negative current-conducting tabs 2 of the heat-generating or heat-conducting battery cells perform temperature control. At this time, the temperature control system 11 can be arranged on the top of the battery cell array 14 to cool the positive and negative current guide tabs 2 , and an elastic insulating and thermally conductive rubber pad is provided between the temperature control system 11 and the battery cell array 14 .

An elastic thermally conductive silicone sheet 12 is arranged between the battery cell array 14 in the battery pack 8 and the top support of the battery pack 8 , which can conduct heat when the battery cell array 14 is overheated or the temperature is too low. The temperature is controlled in an appropriate range to improve the service life and cruising range of the battery pack 8. The temperature control system 11 arranged on the top of the battery cell array 14 can be integrated with the top of the top support of the battery pack 8, and the heat conduction medium of the temperature control system 11 can be a conventional medium such as liquid or gas.

The battery pack 8 only allows the battery cells to participate in series connection in a collective manner when the battery cells are combined in series and parallel.

The metal connection device used in the series connection of the head and tail ends of the battery cell array 14 in the battery pack 8 has the functions of overcurrent fuse and protection.

The battery cell array 14 may be a square-shaped battery cell array 14, and the square-shaped battery cell array 14 is arranged along the thickness direction of the power-type polymer lithium-ion battery cells. The number of battery cell arrays 14 may be one array or two arrays, and the number of the battery cell arrays 14 may not exceed two arrays at most.

A reserved space can be set between the package body and the battery cell array 14 for safety buffering; the temperature control system 11 is provided with a temperature acquisition system for collecting the temperature of the power-type polymer lithium-ion battery cells. At this time, the current The connecting wires, the voltage collecting wires and the temperature collecting system can be arranged in the reserved space; more specifically, the current connecting wires, the voltage collecting wires and the connecting wires of the temperature collecting system and the central plate heating component of the plastic structure frame can be arranged in the battery cells. Both sides of the body array 14 are protruded from the small-sized space of the structure by the fixing holes 6 of the single component, and are then fixed centrally through the insulated wire grooves 13 .

The structural material of the battery pack 8 may adopt one or more combinations of lightweight materials such as pure aluminum, aluminum alloy, aluminum profile, engineering plastic, and basalt fiber material.

The above-mentioned battery pack 8 has strong fast charging and discharging ability, and the battery cell generates less heat, which can completely solve the problems of high internal resistance and body heating of the ultra-long battery; The arrangement of the connecting lines of the central plate heating assembly makes full use of the safety buffer space reserved between the package body structure and the two sides of the battery cell array 14 , which is beneficial to the overall arrangement of the battery cells in the battery pack 8 . The space utilization rate of the battery pack 8 is improved, the energy density and charge-discharge power density of the battery pack 8 are expanded, and the battery pack 8's endurance and safety performance are further enhanced; at the same time, the battery pack 8 cancels the internal parallel mode of the battery, It is beneficial to improve the consistency of battery cells by only adopting a plurality of series-connected structural designs. The battery pack 8 of the present invention is a non-module CTP structure battery pack 8, and is especially suitable for a CTC design scheme, that is, a structural design scheme in which the battery pack 8 and the chassis of an electric vehicle are integrated.

Specific descriptions are given below with reference to each embodiment.

Example 1

In this embodiment, the external dimensions of the battery pack 8 are: the length is 1814mm, the width is 1450mm, the thickness is 135mm, the total volume of the battery pack 8 is 349.0155L, the effective volume of the battery pack 8 distribution box is 44.52L, and the The effective volume is 302.1786L, the effective volume of the battery cell array 14 is 188.2335L, the effective volume of the battery cell is 161.6076L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 302.1786-161.6076= 140.571L, the volume utilization rate of the battery cell in the battery pack 8 is 161.6076/302.1786=53.48%. The battery cells in the battery pack 8 are arranged in two arrays: the battery cell size is 12*605*105mm, the battery cell volume is 0.7623L; the battery cell capacity is 148AH, and the battery cell voltage is 3.60 V, the battery cell power is 532.8WH, the battery cell weight is 1.691kg, the battery cell weight energy density is 316.20WH/kg, the battery cell volume energy density is 698.94WH/L, and the battery cell pole group number is One set; the number of batteries in series and parallel is 1P212S, the voltage of battery pack 8 is 763.2V, and the maximum charging voltage is 890.4V; the weight of the box structure of battery pack 8 is 105kg, the weight of battery pack 8 management system and connectors is 59kg, and the weight of battery pack 8 is 59kg. The total weight of the battery pack is 358.492kg, the total weight of the battery pack 8 is 522.492kg, the weight energy density of the battery pack 8 is 216.18WH/kg, the volume energy density of the battery pack 8 is 373.80WH/L; the total power of the battery pack 8 is 112.9536KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 2

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2274mm, the width is 1450mm, the thickness is 135mm, the total volume of the battery pack 8 is 439.0605L, the effective volume of the battery pack 8 distribution box is 41.4L, and the The effective volume is 385.3926L, the effective volume of the battery cell array 14 is 251.16L, the effective volume of the battery cell is 226.8L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 385.3926-226.8= 158.526L, the volume utilization rate of the battery cell in the battery pack 8 is 226.8/385.3926=58.85%. The arrangement of the battery cells in the battery pack 8 is an array arrangement: the battery cell size is 16*1250*105mm, the battery cell volume is 2.1L; the battery cell capacity is 414AH, and the battery cell voltage is 3.60 V, the battery cell power is 1490.4WH, the battery cell weight is 4.713kg, the battery cell weight energy density is 316.23WH/kg, the battery cell volume energy density is 709.71WH/L, and the battery cell pole group number is Four groups; the number of batteries in series and parallel is 1P108S, the voltage of battery pack 8 is 388.8V, and the maximum charging voltage is 453.6V; the weight of the box structure of battery pack 8 is 124kg, the weight of battery pack 8 management system and connecting parts is 70kg, and the weight of battery pack 8 is 70kg. The total weight of the battery pack is 509.004kg, the total weight of the battery pack 8 is 703.004kg, the weight energy density of the battery pack 8 is 228.96WH/kg, the volume energy density of the battery pack 8 is 417.66WH/L; the total power of the battery pack 8 is 160.9632KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 3

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2274mm, the width is 1450mm, the thickness is 135mm, the total volume of the battery pack 8 is 439.0605L, the effective volume of the battery pack 8 distribution box is 41.4L, and the The effective volume is 385.3926L, the effective volume of the battery cell array 14 is 251.16L, the effective volume of the battery cell is 219.5424L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 385.3926-219.5424= 165.7836L, the volume utilization rate of the battery cell in the battery pack 8 is 219.5424/385.3926=56.97%. The battery cells in the battery pack 8 are arranged in two arrays: the battery cell size is 16*605*105mm, the battery cell volume is 1.0164L; the battery cell capacity is 200AH, and the battery cell voltage is 3.60 V, the battery cell power is 720.00WH, the battery cell weight is 2.298kg, the battery cell weight energy density is 313.32WH/kg, the battery cell volume energy density is 708.38WH/L, and the battery cell pole group number is Two groups; the number of batteries in series and parallel is 1P216S, the voltage of battery pack 8 is 777.6V, and the maximum charging voltage is 907.2V; the weight of the box structure of battery pack 8 is 124kg, the weight of battery pack 8 management system and connectors is 69kg, and the weight of battery pack 8 is 69kg. The total weight of the battery pack is 496.368kg, the total weight of the battery pack 8 is 689.368kg, the weight energy density of the battery pack 8 is 225.60WH/kg, the volume energy density of the battery pack 8 is 403.54WH/L; the total power of the battery pack 8 is 155.52KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 4

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2274mm, the width is 1450mm, the thickness is 135mm, the total volume of the battery pack 8 is 439.0605L, the effective volume of the battery pack 8 distribution box is 41.4L, and the The effective volume is 385.3926L, the effective volume of the battery cell array 14 is 251.16L, the effective volume of the battery cell is 224.175L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 385.3926-224.175= 161.151L, the volume utilization rate of the battery cell in the battery pack 8 is 224.175/385.3926=58.17%. The arrangement of the battery cells in the battery pack 8 is an array arrangement: the battery cell size is 14*1250*105mm, the battery cell volume is 1.8375L; the battery cell capacity is 356AH, and the battery cell voltage is 3.60 V, the battery cell power is 1281.6WH, the battery cell weight is 4.071kg, the battery cell weight energy density is 314.81WH/kg, the battery cell volume energy density is 697.47WH/L, and the battery cell pole group number is Four groups; the number of batteries in series and parallel is 1P122S, the voltage of battery pack 8 is 439.2V, and the maximum charging voltage is 512.4V; the weight of the box structure of battery pack 8 is 124kg, the weight of battery pack 8 management system and connectors is 73kg, and the weight of battery pack 8 is 73kg. The total body weight is 496.662kg, the total weight of the battery pack 8 is 693.662kg, the weight energy density of the battery pack 8 is 225.41WH/kg, the volume energy density of the battery pack 8 is 405.70WH/L; the total power of the battery pack 8 is 156.3552KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 5

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2274mm, the width is 1450mm, the thickness is 135mm, the total volume of the battery pack 8 is 439.0605L, the effective volume of the battery pack 8 distribution box is 41.4L, and the The effective volume is 385.3926L, the effective volume of the battery cell array 14 is 251.16L, the effective volume of the battery cell is 224.175L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 385.3926-224.175= 161.151L, the volume utilization rate of the battery cell in the battery pack 8 is 224.175/385.3926=58.17%. The arrangement of the battery cells in the battery pack 8 is an array arrangement: the battery cell size is 14*1250*105mm, the battery cell volume is 1.8375L; the battery cell capacity is 240AH, and the battery cell voltage is 3.20 V, the power of the battery cell is 768.00WH, the weight of the battery cell is 3.577kg, the weight energy density of the battery cell is 214.71WH/kg, the volume energy density of the battery cell is 417.96WH/L, and the number of battery cell pole groups is Four groups; the number of batteries in series and parallel is 1P122S, the voltage of battery pack 8 is 390.4V, and the maximum charging voltage is 451.4V; the weight of the box structure of battery pack 8 is 124kg, the weight of battery pack 8 management system and connecting parts is 73kg, and the weight of battery pack 8 is 73kg. The total weight of the battery pack is 436.394kg, the total weight of the battery pack 8 is 633.394kg, the weight energy density of the battery pack 8 is 147.93WH/kg, the volume energy density of the battery pack 8 is 243.12WH/L, and the total power of the battery pack 8 is 93.696KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 6

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2274mm, the width is 1586mm, the thickness is 135mm, the total volume of the battery pack 8 is 470.74797L, the effective volume of the battery pack 8 distribution box is 46.296L, and the The effective volume is 415.758L, the effective volume of the battery cell array 14 is 269.29L, the effective volume of the battery cell is 235.173L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 415.758-225.173= 180.585L, the volume utilization rate of the battery cell in the battery pack 8 is 235.173/415.758=56.56%. The battery cells in the battery pack 8 are arranged in two arrays: the battery cell size is 16*673*105mm, the battery cell volume is 1.13064L; the battery cell capacity is 150AH, and the battery cell voltage is 3.20 V, the battery cell power is 480.00WH, the battery cell weight is 2.300kg, the battery cell weight energy density is 208.70WH/kg, the battery cell volume energy density is 424.54WH/L, and the battery cell pole group number is Two groups; the number of batteries in series and parallel is 1P208S, the voltage of battery pack 8 is 665.6V, and the maximum charging voltage is 769.6V; the weight of the box structure of battery pack 8 is 133kg, the weight of battery pack 8 management system and connecting parts is 74kg, and the weight of battery pack 8 is 74kg. The total weight of the battery pack is 478.40kg, the total weight of the battery pack 8 is 685.40kg, the weight energy density of the battery pack 8 is 145.67WH/kg, the volume energy density of the battery pack 8 is 240.14WH/L; the total power of the battery pack 8 is 99.84KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 7

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2274mm, the width is 1586mm, the thickness is 135mm, the total volume of the battery pack 8 is 470.74797L, the effective volume of the battery pack 8 distribution box is 46.296L, and the The effective volume is 415.758L, the effective volume of the battery cell array 14 is 269.29L, the effective volume of the battery cell is 235.173L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 415.758-225.173= 180.585L, the volume utilization rate of the battery cell in the battery pack 8 is 235.173/415.758=56.56%. The battery cells in the battery pack 8 are arranged in two arrays: the battery cell size is 16*673*105mm, the battery cell volume is 1.13064L; the battery cell capacity is 222AH, and the battery cell voltage is 3.60 V, the power of the battery cell is 799.20WH, the weight of the battery cell is 2.530kg, the weight energy density of the battery cell is 315.89WH/kg, the volume energy density of the battery cell is 706.86WH/L, and the number of battery cell pole groups is Two groups; the number of batteries in series and parallel is 1P208S, the voltage of battery pack 8 is 748.8V, and the maximum charging voltage is 873.6V; the weight of the box structure of battery pack 8 is 133kg, the weight of battery pack 8 management system and connecting parts is 74kg, and the weight of battery pack 8 is 74kg. The total weight of the battery pack is 526.24kg, the total weight of the battery pack 8 is 733.24kg, the weight energy density of the battery pack 8 is 226.71WH/kg, the volume energy density of the battery pack 8 is 399.83WH/L; the total power of the battery pack 8 is 166.2336KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 8

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2630mm, the width is 1380mm, the thickness is 135mm, the total volume of the battery pack 8 is 483.394L, the effective volume of the power distribution box of the battery pack 8 is 40.32L, and the The effective volume is 425.979L, the effective volume of the battery cell array 14 is 282.9677L, the effective volume of the battery cell is 253.2516L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 425.979-253.2516= 172.5864L, the volume utilization rate of the battery cell in the battery pack 8 is 253.2516/425.979=59.45%. The arrangement of the battery cells in the battery pack 8 is an array arrangement: the battery cell size is 14*1180*105mm, the battery cell volume is 1.7346L; the battery cell capacity is 226AH, and the battery cell voltage is 3.20 V, the battery cell power is 723.20WH, the battery cell weight is 3.371kg, the battery cell weight energy density is 214.54WH/kg, the battery cell volume energy density is 416.93WH/L, and the battery cell pole group number is Four groups; the number of batteries in series and parallel is 1P146S, the voltage of battery pack 8 is 467.2V, and the maximum charging voltage is 540.2V; the weight of the box structure of battery pack 8 is 137kg, the weight of battery pack 8 management system and connecting parts is 82kg, and the weight of battery pack 8 is 82kg. The total weight of the battery pack is 492.166kg, the total weight of the battery pack 8 is 711.166kg, the weight energy density of the battery pack 8 is 148.47WH/kg, the volume energy density of the battery pack 8 is 247.87WH/L; the total power of the battery pack 8 is 105.5872KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Example 9

In this embodiment, the external dimensions of the battery pack 8 are: the length is 2630mm, the width is 1380mm, the thickness is 135mm, the total volume of the battery pack 8 is 483.394L, the effective volume of the power distribution box of the battery pack 8 is 40.32L, and the The effective volume is 425.979L, the effective volume of the battery cell array 14 is 282.9677L, the effective volume of the battery cell is 253.2516L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 425.979-253.2516= 172.5864L, the volume utilization rate of the battery cell in the battery pack 8 is 253.2516/425.979=59.45%. The arrangement of the battery cells in the battery pack 8 is an array arrangement: the battery cell size is 14*1180*105mm, the battery cell volume is 1.7346L; the battery cell capacity is 226AH, and the battery cell voltage is 3.20 V, the battery cell power is 723.20WH, the battery cell weight is 3.371kg, the battery cell weight energy density is 214.54WH/kg, the battery cell volume energy density is 416.93WH/L, and the battery cell pole group number is Four groups; the number of batteries in series and parallel is 1P146S, the voltage of battery pack 8 is 467.2V, and the maximum charging voltage is 540.2V; the weight of the box structure of battery pack 8 is 137kg, the weight of battery pack 8 management system and connecting parts is 82kg, and the weight of battery pack 8 is 82kg. The total weight of the battery pack is 492.166kg, the total weight of the battery pack 8 is 711.166kg, the weight energy density of the battery pack 8 is 148.47WH/kg, the volume energy density of the battery pack 8 is 247.87WH/L; the total power of the battery pack 8 is 105.5872KWH. Battery pack 8 charging: 6-10min to achieve 20%-90% SOC super charging and 4h slow charging full function; battery pack 8 has a continuous discharge rate of 6-10C and a peak discharge power of 12-20C.

Comparative Example 1

In this embodiment, the external dimensions of the battery pack 8 are: the length is 1814mm, the width is 1450mm, the thickness is 135mm, the total volume of the battery pack 8 is 349.0155L, the effective volume of the battery pack 8 distribution box is 44.52L, and the The effective volume is 302.1786L, the effective volume of the battery cell array 14 is 188.2335L, the effective volume of the battery cell is 161.6076L, and the total volume occupied by the battery pack 8 shell, the internal battery management system and other power distribution modules is 302.1786-161.6076= 140.571L, the volume utilization rate of the battery cell in the battery pack 8 is 161.6076/302.1786=53.48%. The battery cells in the battery pack 8 are arranged in two arrays: the battery cell size is 12*605*105mm, the battery cell volume is 0.7623L; the battery cell capacity is 148AH, and the battery cell voltage is 3.60 V, the battery cell power is 532.8WH, the battery cell weight is 1.685kg, the battery cell weight energy density is 316.20WH/kg, the battery cell volume energy density is 698.94WH/L, and the battery cell pole group number is One set; the number of batteries in series and parallel is 1P212S, the voltage of battery pack 8 is 763.2V, and the maximum charging voltage is 890.4V; the weight of the box structure of battery pack 8 is 105kg, the weight of battery pack 8 management system and connectors is 59kg, and the weight of battery pack 8 is 59kg. The total weight of the battery pack is 357.22kg, the total weight of the battery pack 8 is 521.22kg, the weight energy density of the battery pack 8 is 216.71WH/kg, the volume energy density of the battery pack 8 is 373.80WH/L; the total power of the battery pack 8 is 112.9536KWH. Battery pack 8 charging: 20-30min to achieve 20%-90% SOC and 4h slow charge full function; battery pack 8 only has a continuous discharge rate of 1-3C and a peak discharge power of 4-6C.

The specific parameters of Examples 1-9 and Comparative Example 1 are shown in Table 1 and Table 2.

Table 1

project Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Dimensions of battery pack 1814*1450*135mm 1814*1450*135mm 2274*1450*135mm 2274*1450*135mm 2274*1450*135mm Effective volume of battery pack 302.1786L 302.1786L 385.3926L 385.3926L 385.3926L The effective area of the battery array 188.2335L 188.2335L 251.16L 251.16L 251.16L Number of battery arrays 2 2 1 2 1 Effective volume of battery cell 161.6076L 161.6076L 226.80L 219.5424L 224.175L Volume utilization rate of battery cells 53.48% 53.48% 58.85% 56.97% 58.17% Weight of battery pack structure 105kg 105kg 124kg 124kg 124kg Weight of battery pack bracket connector 59kg 59kg 70kg 69kg 73kg Battery distribution box volume 44.52L 44.52L 41.4L 41.4L 41.4L battery cell weight 1.685kg 1.691kg 4.713kg 2.298kg 4.071kg The number of single cells in series 1P212S 1P212S 1P108S 1P216S 1P122S Total weight of battery cells 357.22kg 358.492kg 509.004kg 496.368kg 496.662kg battery cell size 12*605*105mm 12*605*105mm 16*1250*105mm 16*605*105mm 14*1250*105mm battery cell volume 0.7623L 0.7623L 2.10000L 1.0164L 1.8375L battery cell capacity 148AH 148AH 414AH 200AH 356AH Number of positive and negative pole groups of battery cells 1 2 4 2 4 battery cell voltage 3.60V 3.60V 3.60V 3.60V 3.60V battery power 532.8WH 532.8WH 1490.4WH 720.00WH 1281.6WH Cell Weight Energy Density 316.20WH/KG 315.80WH/KG 316.23WH/KG 313.32WH/KG 314.81WH/KG Volumetric energy density of battery cells 698.94WH/L 698.94WH/L 709.71WH/L 708.38WH/L 697.47WH/L Total weight of battery pack 521.22kg 522.492kg 703.004kg 689.368kg 693.662kg Battery pack weight energy density 216.71WH/KG 216.18WH/KG 228.96WH/KG 225.60WH/KG 225.41WH/KG Battery Pack Volume Energy Density 373.80WH/L 373.80WH/L 417.66WH/L 403.54WH/L 405.70WH/L Battery pack total voltage 763.2V 763.2V 388.8V 777.6V 439.2V The maximum charging voltage of the battery pack 890.4V 890.4V 453.6V 907.2V 512.4V Total battery capacity 112.9536KWH 112.9536KWH 160.9632KWH 155.52KWH 156.3552KWH Battery pack continuous discharge rate 1-3C 6-10C 6-10C 6-10C 6-10C Battery pack peak discharge rate 4-6C 12-20C 12-20C 12-20C 12-20C conventional charging method Slow charge 4h Fast charge 1h/slow charge 4h Fast charge 1h/slow charge 4h Fast charge 1h/slow charge 4h Fast charge 1h/slow charge 4h 20%-90% SOC overcharge method 20-30min 6-10min 6-10min 6-10min 6-10min Wireless charging method Slow charge 4-6h Slow charge 4-6h Slow charge 4-6h Slow charge 4-6h Slow charge 4-6h

Table 2

The battery cells and battery packs of the above-mentioned Examples 1-9 and Comparative Example 1 all adopt the general dimensions currently adopted by domestic and foreign leading enterprises.

By analyzing the data of Comparative Example 1 and Examples 1-9, it can be seen that the battery cells and battery packs applied for according to the present invention are relatively conventional in terms of gravimetric energy density, volumetric energy density, charge-discharge power density, and battery pack power. There is a big improvement, and the improvement effect is more obvious, so that the cruising range of pure electric vehicles can reach 700-1100 kilometers:

1) Comparative Example 1. The general-purpose battery packs of the size described in Examples 1-5 are currently made of 590 modules composed of 3.6V cells with a single voltage. The battery pack capacity ranges from 82KWH to 110KWH, and the volume remains unchanged. Under the circumstance of using the patent application of the present invention, the available power of the battery cell and the battery pack can reach 112KWH-160KWH, the increase range is 35%-45%, and the weight energy density of the battery pack is greater than 216WH/kg. The battery pack composed of 3.2V iron-lithium batteries can also reach an available power of 95-100KWH, which is more than 16% higher than the existing general-purpose battery pack, and the weight energy density of the battery pack is greater than 145WH/kg. The effective utilization of the volume of the battery cells in the battery pack (excluding the volume of the battery separator) reached a high level of nearly 60%, and decreased with the increase of the number of arrays.

2) The battery packs of the size described in Examples 8-9 are used by a well-known domestic company. Currently, they are directly combined with a single-voltage 3.2V iron-lithium battery. The capacity of the battery pack is about 74KWH. In the case of change, the available power of the battery cell and battery pack using the patent application of the present invention can reach 105.587KWH, an increase of more than 42%, and the weight energy density of the battery pack reaches 148.47WH/kg. The usable power of the battery pack composed of 3.6V ternary battery cells with a single voltage can reach 176.6KWH, an increase of more than 138%, and the weight energy density of the battery pack reaches 226.43WH/kg.

3) The battery cells and battery packs applied for according to the present invention both support the full charging mode of fast charge 1h/slow charge 4h, and the battery pack 8 using the system design scheme of the present invention can also achieve 20%-90% in 6-10 minutes SOC super fast charging mode.

4) Both the battery cell and the battery pack according to the present invention can achieve a continuous discharge power of 6-10C and a peak discharge power of 12-20C.

5) Both the battery cell and the battery pack applied for according to the present invention support the wireless charging function, and the charging power is mainly selected in the slow charging mode.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. The power type polymer lithium ion battery monomer is characterized by comprising a battery body, wherein the battery body is formed by stacking a battery cell, positive and negative pole pieces of the battery cell are provided with more than two groups of positive and negative pole flow guide lugs, the positive and negative pole flow guide lugs are positioned on the top end surface in the height direction of the battery cell, the battery body is sealed and packaged by an aluminum-plastic composite film, and the power type polymer lithium ion battery monomer is provided with a width L, a height H and a thickness D, wherein the width L is greater than the height H, the height H is greater than the thickness D, the width L is 600 + 2600mm, and the L/H is 7-35.

2. The power polymer lithium ion battery cell of claim 1, further comprising a busbar welded to the positive and negative electrode current-conducting tabs to connect the power polymer lithium ion battery cells in series.

3. The monomer for the dynamic polymer lithium ion battery as claimed in claim 1, wherein the distance between the positive and negative electrode current-guiding tabs of adjacent homopolar electrodes is 250-400 mm.

4. A power type polymer lithium ion battery monomer assembly is characterized by comprising an I-shaped plastic frame and two power type polymer lithium ion battery monomers according to any one of claims 1 to 3, wherein the two power type polymer lithium ion battery monomers are oppositely fixed on two sides of a central plate of the I-shaped plastic frame, an elastic insulating and heat-insulating plate is arranged on the outer side of each power type polymer lithium ion battery monomer, and the inner side of each power type polymer lithium ion battery monomer is fixed on the central plate of the I-shaped plastic frame in an insulating mode through heat-conducting glue.

5. The dynamic polymer lithium ion battery cell assembly according to claim 4, wherein a plurality of fixing holes for fixing the dynamic polymer lithium ion battery cell assembly into a battery cell array are formed on the I-shaped plastic frame.

6. The power type polymer lithium ion battery cell assembly according to claim 4, wherein a heat generating assembly is disposed on the central plate of the I-shaped plastic frame, and the heat generating assembly can heat the power type polymer lithium ion battery cell when the temperature of the power type polymer lithium ion battery cell is lower than a set temperature.

7. A battery pack is characterized by comprising a pack body and a battery monomer array, wherein the battery monomer array comprises a plurality of power type polymer lithium ion battery monomer assemblies as claimed in any one of claims 4 to 6, the plurality of power type polymer lithium ion battery monomer assemblies are fixed into the battery monomer array through fixing pieces, a placing area is arranged in the pack body, and the battery monomer array is fixedly placed in the placing area of the pack body.

8. The battery pack according to claim 7, further comprising a temperature control system disposed on top of the battery cell array for cooling the positive and negative electrode tabs, wherein an elastic insulating and heat conducting rubber pad is disposed between the temperature control system and the battery cell array.

9. The battery pack according to claim 8, wherein the battery cell array is a square battery cell array disposed in a thickness direction of the power polymer lithium ion battery cell.

10. The battery pack of claim 9, wherein a headspace is provided between the pack body and the battery cell array; the temperature control system is provided with a temperature acquisition system for acquiring the temperature of the power polymer lithium ion battery monomer, and the current connecting lead, the voltage acquisition line and the temperature acquisition system are arranged in the reserved space.

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