RU2793962C1 - Battery, power device, method and device for battery manufacturing - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention is related specifically to a battery and an energy-consuming device with such a battery and can be used in the automotive industry. The battery cell contains a pressure relief mechanism, the pressure relief mechanism is located in the first wall of the battery cell, and the pressure relief mechanism is configured to be actuated to reduce the internal pressure, when the internal pressure or temperature of the battery cell reaches a threshold value, and also contains a thermoregulatory component for the fluid medium to adjust the temperature of the battery cell, wherein the thermoregulatory component is capable of being damaged when the pressure release mechanism is actuated, as a result of which the fluid is discharged from the inside of the thermoregulatory component. The fluid can absorb heat from the battery cell and lower the emission temperature, whereby the risk caused by a failure of one battery cell can be suppressed and the possibility of battery explosion can be reduced, and the safety of the battery can be improved.

EFFECT: improvement of safety of the battery.

19 cl, 24 dwg

Description

Technical field

Embodiments of the present invention relate to the field of batteries, and more particularly to a battery, a power consuming device, and a method and apparatus for manufacturing a battery.

State of the art

Saving energy and reducing emissions are key factors for the sustainable development of the automotive industry. In this case, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages in terms of energy saving and environmental friendliness. For electric vehicles, battery technology is an important factor related to their development.

In the development of battery technology, in addition to improving the performance of batteries, the issue of safety cannot be ignored either. If the safety of the batteries cannot be ensured, the batteries must not be used. Therefore, improving the safety of batteries is an urgent technical challenge in battery technology.

Disclosure of invention

Embodiments of the present invention provide a battery, a power consuming device, a method and an apparatus for manufacturing a battery, which can improve the safety of a battery.

In a first aspect, a battery is provided, comprising: a battery cell comprising a pressure relief mechanism, wherein the pressure relief mechanism is disposed in a first wall of the battery cell, and the pressure relief mechanism is configured to be actuated to reduce internal pressure when the internal pressure or temperature of the battery element reaches the threshold value; and a temperature control component for holding a fluid for adjusting the temperature of the battery cell; wherein the first surface of the thermostatic component is affixed to the first wall, and the thermostatic component is configured to be damaged when the pressure release mechanism is actuated, whereby fluid is discharged from within the thermostatic component.

In an embodiment of the present invention, the first surface of the thermostatic component is attached to the first wall provided with a pressure relief mechanism therein. So when the pressure relief mechanism is actuated, emissions from the battery cell are released towards the thermostatic component. Also, the thermostatic component is configured to be damaged when the pressure release mechanism is actuated, whereby fluid is released from inside the thermostatic component. So that the fluid can absorb heat from the battery cell and lower the temperature of the emissions. By cooling the fluid, the temperature of the discharge from the battery cell can be quickly reduced, whereby the risk caused by the failure of one battery cell can be suppressed for the first time, the possibility of battery explosion can be reduced, and the safety of the battery can be improved.

In some embodiments of the invention, the thermostatic component is configured to be damaged by emissions emitted from the battery cell when the pressure relief mechanism is activated, whereby the emissions pass through the thermostatic component.

When the pressure release mechanism is actuated, the emissions released from the battery cell pass through the thermal control component and quickly move away from the battery cell, further reducing the risk caused by the emissions.

In some embodiments, the thermostatic component is provided with a recess therein, wherein the side surface of the recess is capable of being damaged by ejections emitted from the battery cell, whereby fluid is discharged from within the thermostatic component.

In some embodiments of the invention, the bottom wall of the recess is configured to be damaged by surges when the pressure relief mechanism is actuated, whereby the surges pass through the thermostatic component.

In some embodiments of the invention, the side surface of the recess is made with the possibility of breakthrough and/or melting emissions, whereby the fluid is released from within the thermostatic component.

In some embodiments of the invention, the bottom wall of the recess is made with the possibility of breakthrough and/or melting surges, whereby the emissions pass through the thermostatic component.

In the case of using a recess, when the pressure release mechanism is actuated, the emissions from the battery cell are rapidly directed into the recess. Since the bottom wall of the recess is relatively weak, the ejecta will damage the bottom wall of the recess and enter the collection chamber. In addition, the ejecta rushing into the recess also melts the side surface of the recess, whereby the fluid is released from inside the thermostatic component, thereby cooling the hot ejecta.

In some embodiments of the invention, the radial size of the recess gradually decreases in the direction away from the pressure relief mechanism. This can increase the area of contact with blowouts and contribute to blowout damage.

In some embodiments of the invention, the bottom wall of the recess is provided with a weakened zone, while the weakened zone is capable of being damaged by blowouts when the pressure relief mechanism is activated, whereby the blowouts pass through the weakened zone.

Providing a weakened zone makes it easier for emissions to pass through the thermostatic component.

In some embodiments of the invention, the weakened zone has a thickness that is less than or equal to 3 mm.

In some embodiments, the weakened zone has a lower melting point than the rest of the thermostatic component.

In some embodiments, the weakened zone material has a melting point below 400°C.

In some embodiments of the invention, the recess is made in the first surface.

In some embodiments of the invention, the thermostatic component comprises a first heat-conducting plate and a second heat-conducting plate, wherein the first heat-conducting plate is located between the first wall and the second heat-conducting plate and is attached to the first wall, the first section of the first heat-conducting plate is recessed in the direction of the second heat-conducting plate to form a recess, and the first section is connected to the second heat transfer plate.

In some embodiments, the first portion is provided with a first through hole, and the radial size of the first through hole is smaller than the radial size of the recess.

In some embodiments of the invention, the thickness of the second heat transfer plate, which corresponds to the first through hole, is less than the thickness of the second heat transfer plate in other areas. Thus, the weakened zone is more easily damaged by outliers.

In some embodiments, the recess is provided as a bypass chamber to allow the pressure relief mechanism to open when the pressure relief mechanism is actuated.

The bypass chamber provides a deformation space for the pressure relief mechanism, whereby the pressure relief mechanism deforms in a direction towards the temperature control component and cracks.

In some embodiments of the invention, the depth of the recess depends on the size of the pressure relief mechanism.

In some embodiments of the invention, the recess has a depth greater than 1 mm.

In some embodiments, the opening area of the recess depends on the area of the pressure relief mechanism.

In some embodiments of the invention, the ratio of the area of the opening of the recess to the area of the pressure relief mechanism is in the range from 0.5 to 2.

In some embodiments, at least a portion of the pressure relief mechanism protrudes outward from the first wall and the bypass chamber is configured to receive at least a portion of the pressure relief mechanism.

In some embodiments, a portion of the first wall around the pressure relief mechanism protrudes outward, and the bypass chamber is configured to receive the protruding portion of the first wall around the pressure relief mechanism.

Thus, the first wall of the battery cell can be tightly attached to the surface of the temperature control component, which makes it easier to fix the battery cell, and can also save space and improve thermal control efficiency. Moreover, when the pressure release mechanism is operated, the emissions from the battery cell can be discharged to the bypass chamber and away from the battery cell, thereby reducing the risk due to the emissions, so that the safety of the battery can be improved.

In some embodiments of the invention, the thermostatic component is provided with a second through hole located therein, while the second through hole is configured so that emissions emitted from the battery cell can pass through the thermostatic component through the second through hole when the pressure relief mechanism is actuated.

In some embodiments of the invention, the wall with the opening of the second through hole is made with the possibility of damage by emissions, as a result of which the fluid is released from inside the thermostatic component.

In some embodiments of the invention, the wall with the opening of the second through hole is made with the possibility of breaking through and/or melting with emissions, as a result of which the fluid is released from the inside of the thermostatic component.

When the pressure relief mechanism is actuated, the emissions from the battery cell are rushed into the second through hole. Because the ejecta have high pressure and high temperature, the ejecta further melts the orifice wall of the second through hole while passing through the second through hole, whereby the fluid is discharged from inside the thermostatic component, thereby cooling the ejecta.

In some embodiments of the invention, the radial size of the second through hole gradually decreases in the direction away from the pressure relief mechanism. This can increase the area of contact with blowouts and contribute to blowout damage.

In some embodiments of the invention, the opening area of the second through hole depends on the area of the pressure relief mechanism.

In some embodiments of the invention, the ratio of the opening area of the second through hole to the area of the pressure relief mechanism is in the range from 0.5 to 2.

In some embodiments, at least a portion of the pressure relief mechanism protrudes from the first wall and the second through hole is used to receive at least a portion of the pressure relief mechanism.

Thus, the first wall of the battery cell can be tightly attached to the surface of the thermal control component, which helps to fix the battery cell, and can also save space and improve thermal control efficiency. Moreover, when the pressure release mechanism is operated, the ejections from the battery cell can be discharged to the second through hole and away from the battery cell, thereby reducing the risk due to ejections, so that the safety of the battery can be improved.

In some embodiments, a portion of the first wall around the pressure relief mechanism protrudes outward, and a second through hole is used to receive the protruding portion of the first wall around the pressure relief mechanism.

In some embodiments, the pressure release mechanism is provided with a breaking device, wherein the breaking device is used to damage the thermostatic component when the pressure release mechanism is actuated, causing fluid to escape from within the thermostatic component.

In some embodiments, the breaking device is a spike.

In some embodiments of the invention, the battery further comprises: an electrical chamber for accommodating a plurality of battery cells; and a collection chamber for collecting emissions emitted from the battery cells and emissions from the thermostatic component when the pressure relief mechanism is actuated; wherein the thermostatic component is configured to isolate the electrical chamber from the collection chamber.

The electrical chamber for accommodating battery cells is separated from the collection chamber for collecting emissions by means of a temperature control component. By actuating the pressure release mechanism, emissions from the battery cell enter the collection chamber rather than the electrical chamber, or with little entry into the electrical chamber, whereby the electrical connections in the electrical chamber are not affected, and thus can be increased battery safety.

In some embodiments of the invention, the thermostatic component includes a wall that is common to the electrical chamber and the collection chamber.

Since the temperature control component contains a wall common to the electrical chamber and the collection chamber, emissions can be isolated from the electrical chamber as far as possible, thus reducing the risk due to emissions and improving battery safety.

In some embodiments of the invention, the battery further comprises a security element, wherein the security element is configured to protect the thermal control component, wherein the security element and the thermal control component form a collection chamber.

The collection chamber formed by the protective element and the temperature control component can effectively collect and store emissions and reduce the risk caused by them.

In some embodiments of the invention, the electrical chamber is isolated from the collection chamber by a thermal control component.

The collection chamber does not communicate with the electrical chamber, and liquid or gas, etc. in the collection chamber cannot flow into the electrical chamber, so that the electrical chamber can be better protected.

In some embodiments, the thermostatic component is configured to allow emissions emitted from the battery cell to pass through the thermostatic component and enter the collection chamber when the pressure relief mechanism is actuated.

In some embodiments, the second wall of the battery cell is provided with an electrode terminal and the second wall is different from the first wall.

The pressure relief mechanism and the electrode terminals are provided on different walls of the battery cell so that when the pressure relief mechanism is actuated, the discharges from the battery cell can be more distant from the electrode terminals, thereby reducing the effect of the discharges on the electrode terminals and the bus component, and, therefore improves battery safety.

In some embodiments, the implementation of the second wall is located opposite the first wall.

In some embodiments, the pressure release mechanism is a temperature sensitive pressure release mechanism configured to melt when the internal temperature of the battery cell reaches a threshold; and/or the pressure release mechanism is a pressure sensitive pressure release mechanism capable of rupturing when the internal pressure of the battery cell reaches a threshold value.

In a second aspect, a power consuming device is provided, comprising a battery according to the first aspect.

In some embodiments of the invention, the power consuming device is a vehicle, ship, or spacecraft.

In a third aspect, a method for manufacturing a battery is provided, including: providing a battery cell, the battery cell comprising a pressure relief mechanism, the pressure relief mechanism being disposed in a first wall of the battery cell, and the pressure relief mechanism being configured to be actuated to reduce internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; providing a temperature control component, wherein the temperature control component is used to store a fluid; and attaching the first surface of the thermostatic component to the first wall, wherein the thermostatic component can be damaged when the pressure release mechanism is actuated, whereby fluid is discharged from inside the thermostatic component.

In some embodiments of the invention, the thermostatic component can be damaged by emissions emitted from the battery cell when the pressure relief mechanism is activated, whereby the emissions pass through the thermostatic component.

In some embodiments, the thermostatic component is provided with a recess therein, and the bottom wall of the recess may be damaged by ejections emitted from the battery cell when the pressure release mechanism is actuated, whereby the emissions pass through the thermostatic component, and the side surface of the recess may be damaged. emissions, whereby the fluid is released from within the thermostatic component.

In some embodiments of the invention, the bottom wall of the recess is provided with a weakened zone, while the weakened zone is capable of being damaged by blowouts when the pressure relief mechanism is activated, whereby the blowouts pass through the weakened zone.

In some embodiments of the invention, the thermostatic component is provided with a second through hole, wherein the second through hole is configured such that emissions emitted from the battery cell can pass through the thermostatic component through the through hole when the pressure relief mechanism is actuated, and the wall with the second through hole orifices can be damaged by ejections, causing fluid to escape from inside the thermostatic component.

In a fourth aspect, a battery manufacturing apparatus is provided, comprising a module for carrying out the method according to the third aspect described above.

The accompanying graphics described in this document are intended to provide additional understanding of the application and form part of the application. The exemplary embodiments of the present invention and their description are intended to be illustrative of the invention and do not constitute an undue limitation of the invention.

Brief description of the drawings

In FIG. 1 schematically shows a vehicle according to an embodiment of the invention;

in fig. 2 schematically shows the construction of a battery according to an embodiment of the invention;

in fig. 3 schematically shows the construction of a battery module according to an embodiment of the invention;

in fig. 4 is an exploded view of a battery cell according to an embodiment of the invention;

in fig. 5 is an exploded view of a battery cell according to another embodiment of the present invention;

in fig. 6 and 7 schematically show battery designs in accordance with some embodiments of the invention;

in fig. 8a is a schematic plan view of a battery according to an embodiment of the invention;

in fig. 8b schematically shows the battery of FIG. 8a in cross section along the line A-A;

in fig. 8c is a schematic enlarged view of part B of the battery of FIG. 8b;

in fig. 9a is a schematic perspective view of a thermostatic component according to an embodiment of the invention;

in fig. 9b schematically shows the thermostatic component of FIG. 9a in cross section along A-A;

in fig. 9c is an enlarged view of a thermostatic component according to an embodiment of the invention;

in fig. 10-17 schematically show batteries according to some embodiments of the invention;

in fig. 18 is an exploded view of a battery according to an embodiment of the invention;

in fig. 19 is a flow chart of a method for manufacturing a battery according to an embodiment of the invention; And

in fig. 20 is a block diagram of a battery manufacturing apparatus according to an embodiment of the invention.

Implementation of the invention

In order to make the objectives, technical solutions and advantages of the embodiments of the invention more clear, the technical solutions in the embodiments of the invention will be clearly described below with reference to the drawings for the embodiments of the invention. Obviously, the described embodiments represent some, and not all, embodiments of the invention. All other embodiments obtained without creative effort by a person skilled in the art based on embodiments of the invention should be within the scope of the protection of the invention.

Unless otherwise defined, all technical and scientific terms used in the application have the same meaning as the terms commonly understood by specialists in the field of technology to which this application pertains. The terms used in the description are for the sole purpose of describing specific embodiments and are not intended to limit the present application. The words "comprising" and "having" and any variations thereof in the description and claims of the present application, as well as in the above description of the accompanying drawings, are intended to cover non-exclusive inclusions. The words "first", "second", etc. in the description and claims of the present application, as well as in the above drawings, are used to distinguish between different objects, and not to describe a specific order or relationship of "main-auxiliary".

The expression "embodiments" as used in this application means that descriptions of specific features, structures and characteristics in combination with embodiments are included in at least one embodiment of the invention. The expression at different places in the description does not necessarily refer to the same embodiment or to a separate or alternative embodiment that excludes another embodiment. Those skilled in the art will understand, implicitly and explicitly, that an embodiment of the invention described in this application may be combined with another embodiment of the invention.

It should be noted that in the description of the present application, unless expressly indicated and defined otherwise, the words "install", "connect", "connection" and "attachment" must be understood in a broad sense, for example, they can mean a fixed connection, a detachable connection or integrated connection; may indicate a direct connection, and may also indicate an indirect connection through an intermediate element, or may indicate a connection between the interiors of two elements. A person skilled in the art can understand the specific meanings of the above words in this application according to specific circumstances.

In the present application, the term "and/or" is only an association relation describing related objects, which means that there may be three relations, for example, A and/or B can represent three situations: only A exists; both A and B exist; and only B exists. In addition, the "/" symbol in this application generally indicates that the related entities before and after this symbol are in an "or" relationship.

In the present application, the expression "multiple" means two or more (including two), similarly, "multiple groups" means two or more groups (including two groups), and "multiple sheets" means two or more sheets (including two sheets).

In the present application, the battery cell may include a secondary cell lithium ion battery, a primary cell lithium ion battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., which is not limited to embodiments of the invention. The battery cell may have a cylindrical, flat, cubic or other shape, which is not limited to embodiments of the invention. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, prismatic battery cell, and bag battery cell, which is not limited to embodiments of the invention.

A battery referred to in embodiments of the invention refers to a single physical module containing one or more battery cells to provide higher voltage and capacity. For example, the battery specified in this application may contain a battery module or a battery pack, etc. The battery typically includes a housing for housing one or more battery cells. The case may prevent liquid or other foreign bodies from affecting the charging or discharging of the battery cell.

The battery cell includes an electrode assembly and an electrolyte solution, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and an insulating film. The operation of a battery cell is generally based on the movement of metal ions between the positive sheet electrode and the negative sheet electrode. The positive sheet electrode comprises a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer forms a coating on the surface of the positive electrode current collector, and the current collector not covered with the positive electrode active material layer protrudes from the current collector covered with the positive electrode active material layer and is used as a positive electrode terminal. Taking a lithium ion battery as an example, the positive electrode current collector material may be aluminum, and the positive electrode active material may be lithium cobalt oxides, lithium iron phosphate, lithium ternary or lithium manganate, etc. The negative sheet electrode comprises a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer forms a coating on the surface of the negative electrode current collector, and the current collector not covered with the negative electrode active material layer protrudes from the current collector covered with the negative electrode active material layer and is used as a negative electrode terminal. The current collector material of the negative electrode may be copper, and the active material of the negative electrode may be carbon or silicon, etc. In order to prevent melting when a large current is passed, there are a plurality of positive electrode terminals assembled together and there are a plurality of negative electrode terminals assembled together. The material of the insulating film may be polypropylene or polyethylene, etc. In addition, the electrode assembly may have a helical structure or a multilayer structure, and embodiments of the invention are not limited to this. With the development of battery technology, many design factors need to be considered, such as specific energy, cycle limit, discharge capacity, time to full charge or discharge, and other performance parameters. In addition, the safety of the battery must also be considered.

In the case of a battery cell, the main safety hazards come from the charging and discharging processes, and suitable design is also required considering the ambient temperature. In order to effectively avoid unnecessary losses, at least three protection measures are commonly used for a battery cell. In particular, the protective measures include at least a switching element, an appropriately selected insulating film material and a pressure relief mechanism. The switching element refers to an element that can stop charging or discharging a battery when the temperature or resistance in the battery cell reaches a certain threshold. The insulating film is configured to insulate the positive sheet electrode from the negative sheet electrode, and can automatically eliminate micron-scale (or even nano-scale) micropores attached to the insulating film when the temperature rises to a certain value, thus preventing metal ions from passing through the insulating film and stopping the internal battery cell response.

The pressure release mechanism refers to a cell or component that is actuated to release internal pressure or temperature when the internal pressure or temperature of a battery cell reaches a predetermined threshold. Threshold design varies according to different design requirements. The threshold value may depend on the material of one or more of the positive sheet electrode, the negative sheet electrode, the electrolyte solution, and the insulating film in the battery cell. The pressure relief mechanism may be an anti-explosion valve, an air valve, a pressure relief valve, a safety valve, and the like. and, in particular, may contain a pressure-sensitive or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold value, the pressure release mechanism performs an action, or the weakened structure provided in the pressure release mechanism is damaged, thereby forming an opening or passage for releasing the internal pressure or temperature.

"Activation" referred to in the application means that the pressure relief mechanism operates or is activated in a certain state, whereby the internal pressure and temperature of the battery cell can be reduced. The action performed by the pressure relief mechanism may include, but is not limited to, the following: cracking, breaking, tearing or opening, etc. at least part of the pressure relief mechanism. When the pressure release mechanism is actuated, the high temperature and high pressure substances inside the battery cell are released to the outside as bursts from the actuating position. Thus, the pressure and temperature in the battery cell can be reduced to a controlled pressure or temperature, thereby avoiding potentially more serious accidents.

Emissions from a battery cell referred to in this application include, but are not limited to: electrolyte solution, dissolved or shattered positive and negative sheet electrodes, fragments of insulating film, high temperature and high pressure gas generated by reaction, flames, etc.

The pressure relief mechanism on the battery cell has a strong impact on the safety of the battery. For example, when a short circuit, overcharge, and other phenomena occur, they can lead to thermal runaway inside the battery cell, which leads to a sudden rise in pressure or temperature. In this case, the internal pressure and temperature can be reduced by venting to the outside by actuating the pressure release mechanism to prevent the battery cell from exploding and catching fire.

In the current design of the pressure relief mechanism, the main task is to reduce the high pressure and high temperature inside the battery cell, i.e. releasing emissions to the outside of the battery cell. However, to provide a battery output voltage or current, a plurality of battery cells are often required to be electrically connected to each other via a bus component. Emissions released from the inside of a battery cell can short out other battery cells. For example, when released metal debris electrically connects two components in a busbar, the battery can be short-circuited, thus presenting a potential safety hazard. In addition, high temperature and high pressure ejections are discharged towards the pressure relief mechanism provided in the battery cell, and in particular, can be discharged towards the portion where the pressure relief mechanism is operated. The force and destructive effect of such releases may be significant, or may even be sufficient to break through one or more structures in that direction, causing further safety concerns.

In view of this, the embodiments of the invention provide a solution in which a battery cell wall provided with a pressure relief mechanism is attached to the thermostatic component, and the thermostatic component is damaged by actuating the pressure relief mechanism, whereby the fluid inside the thermostatic component is released and can cool emissions for reduce the risk caused by emissions, thereby improving battery safety.

The temperature control component is configured to contain a fluid medium in order to control the temperatures of a plurality of battery cells. In this case, the fluid may be a liquid or a gas, and adjusting the temperature means heating or cooling a plurality of battery cells. In the case of cooling or lowering the temperatures of the battery cells, the temperature control component is configured to accommodate a cooling fluid to lower the temperatures of a plurality of battery cells. In this case, the temperature control component may also be referred to as a cooling component, a cooling system, or a cooling plate, etc. The fluid placed in the thermostatic component may also be referred to as a coolant or a cooling fluid, and in particular may be referred to as a coolant or a coolant gas. In addition, the temperature control component can also be used to heat to increase the temperatures of a plurality of battery cells, which is not limited to embodiments of the application. Optionally, the fluid may flow in a circulating manner to achieve better temperature control results. Optionally, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

The electrical chamber mentioned in the present application is used to receive multiple battery cells and a bus component. The electrical chamber can be hermetic or non-hermetic. The electrical chamber provides an installation space for the battery cells and the busbar component. In some embodiments of the invention, a structure capable of fixing the battery cells may also be provided in the electrical chamber. The shape of the electrical chamber can be determined according to the plurality of battery cells and the busbar component that are housed therein. In some embodiments, the implementation of the electrical chamber may be a cube with six walls. Because the battery cells in the electrical box generate a higher output voltage through the electrical connection, the electrical box may also be referred to as a "high voltage box".

The bus-like component mentioned in the application is used to realize an electrical connection between a plurality of battery cells, such as a parallel or series connection or parallel-series connection. The bus-like component can realize an electrical connection between the battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the tire component may be attached to the electrode terminals of the battery cells by welding. Similar to the "high voltage chamber", the electrical connection formed by the busbar component may also be referred to as the "high voltage connection".

The collection chamber referred to in this application is used to collect emissions and may or may not be sealed. In some embodiments, the collection chamber may contain air or other gas. There is no electrical connection to the output voltage in the collection chamber. Similar to the "high voltage chamber", the collection chamber may also be referred to as the "low voltage chamber". Optionally or additionally, the collection chamber may also contain a liquid, such as a cooling medium, or a liquid accommodation component may also be provided in the collection chamber to further cool emissions entering the collection chamber. In addition, optionally, the gas or liquid in the collection chamber flows in a circulating manner.

All the technical solutions described in the embodiments of the present application are applicable in various battery-using devices such as mobile phones, portable devices, laptops, electric vehicles, electronic toys, electric tools, electric vehicles, ships and spacecraft. For example, spacecraft include aircraft, rockets, space shuttles, spacecraft, and so on.

It should be understood that the technical solutions described in the embodiments of the present application are not only applicable to the above devices, but also applicable to all devices using batteries. However, for the sake of brevity, the following embodiments use electric vehicles as an example for description.

For example, in FIG. 1 schematically shows the construction of a vehicle 1 according to an embodiment of the invention. The vehicle 1 may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle may be a battery electric vehicle, a hybrid vehicle, or an extended range vehicle, or the like. Motor 40, controller 30, and battery 10 may be configured inside vehicle 1, and controller 30 is configured to control battery 10 to supply power to motor 40. For example, battery 10 may be configured at the bottom, or at the front, or at the rear. of the vehicle 1. The battery 10 may be configured to supply power to the vehicle 1. For example, the battery 10 may be used as the operating power source of the vehicle 1 and is used for the electrical system of the vehicle 1, for example, to supply the required operating energy to the vehicle 1 during launch, navigation and operation. In another embodiment of the invention, the battery 10 can be used not only as the operating power source of the vehicle 1, but also as the power source of the vehicle 1, replacing or partially replacing the fuel or natural gas to provide the driving power for the vehicle 1.

In order to meet different power requirements, a battery may comprise a plurality of battery cells, wherein the plurality of battery cells may form a parallel connection, a series connection, or a series-parallel connection. Series-parallel connection refers to the combination of series connection and parallel connection. A battery may also be referred to as a battery pack. Optionally, a plurality of battery cells may first be connected in series, in parallel, or in series and in parallel to form battery modules, and then a plurality of battery modules may be connected in series, in parallel, or in series and in parallel to form a battery. That is, a plurality of battery cells may directly form a battery, or may first form battery modules, and then the battery modules form a battery.

For example, as shown in FIG. 2, which is a schematic representation of the construction of a battery 10 according to one embodiment of the invention, the battery 10 may include a plurality of battery cells 20. The battery 10 may further comprise a case (or shell) whose interior is a hollow structure, and a plurality of battery cells 20 are housed in casing. As shown in FIG. 2, the casing may include two parts, which are called the first part 111 and the second part 112, respectively, and the first part 111 and the second part 112 are fastened together. The shapes of the first part 111 and the second part 112 may be determined according to the shape of the combined plurality of battery cells 20, and each of the first part 111 and the second part 112 may have an opening. For example, each of the first part 111 and the second part 112 may be a hollow cuboid, and each has only one opening surface, and the opening of the first part 111 is opposite the opening of the second part 112. The first part 111 and the second part 112 are bonded to each other. with the other so as to form a casing with a closed chamber. A plurality of battery cells 20 are connected by a parallel connection, or a series connection, or a series-parallel connection, and then placed in a casing formed by fastening the first part 111 to the second part 112.

Optionally, battery 10 may also include other designs that will not be described in detail herein. For example, battery 10 may also include a tire component. The bus component is configured to realize an electrical connection between a plurality of battery cells 20, such as a parallel connection, a series connection, or a series-parallel connection. In particular, the busbar component can realize the electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. In addition, the busbar component can be attached to the electrode terminals of the battery cells 20 by welding. The electrical energy from the plurality of battery cells 20 can be transmitted further through the electrically conductive mechanism extending through the case. Optionally, the electrically conductive mechanism may also refer to a bus component.

According to different energy requirements, any number of battery cells 20 can be set. A plurality of battery cells 20 can be connected in series, in parallel, or in series and in parallel to realize higher capacity or power. Since many battery cells 20 may be contained in each battery 10, the battery cells 20 may be arranged in groups for installation convenience, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 contained in the battery module is not limited and can be set as needed. For example, in FIG. 3 shows an example of a battery module. A battery may comprise a plurality of battery modules, and these battery modules may be connected in series, in parallel, or in series and in parallel.

In FIG. 4 is a schematic structural view of a battery cell 20 according to one embodiment of the invention. The battery cell 20 includes one or more electrode assemblies 22, a housing 211, and a cover plate 212. The coordinate system shown in FIG. 4 is the same as in FIG. 3. The housing 211 and the cover plate 212 form the casing or battery box 21. The wall of the housing 211 and the cover plate 212 are considered to be the walls of the battery cell 20. The shape of the housing 211 corresponds to the shape of one or more electrode assemblies 22 after being combined. For example, the housing 211 may be a hollow cuboid or cube or cylinder and one surface of the housing 211 has an opening such that one or more electrode assemblies 22 may be housed in the housing 211. For example, when the housing 211 is a hollow cuboid or a cube, one plane of the housing 211 is a surface with a hole, i.e. the plane does not contain a wall, so that the spaces inside and outside of the housing 211 communicate with each other. When the body 211 is a hollow cylinder, the end surface of the body 211 is a holed surface, i. the end surface does not contain a wall, so that the spaces inside and outside of the housing 211 communicate with each other. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

The battery cell 20 may further include two electrode terminals 214, and two electrode terminals 214 may be provided on the cover plate 212. The cover plate 212 is generally in the form of a flat plate, and the two electrode terminals 214 are fixed on the surface of the flat plate, which is the cover plate 212. The two electrode terminals 214 are the positive electrode terminal 214a and the negative electrode terminal 214b, respectively. Each electrode terminal 214 is suitably provided with a connecting member 23, also referred to as a current collector 23, which is located between the cover plate 212 and the electrode assembly 22 and is configured to electrically connect the electrode assembly 22 to the electrode terminal 214.

As shown in FIG. 4, each electrode assembly 22 includes a first electrode terminal 221a and a second electrode terminal 222a. The first electrode terminal 221a and the second electrode terminal 222a have opposite polarities. For example, when the first electrode terminal 221a is a positive electrode terminal, the second electrode terminal 222a is a negative electrode terminal. The first terminal 221a of one or more electrode assemblies 22 is connected to one electrode terminal via one connector 23, and the second terminal 222a of one or more electrode assemblies 22 is connected to the other electrode terminal via another connector 23. For example, positive electrode terminal 214a is connected with the positive electrode terminal through one connector 23, and the negative electrode terminal 214b is connected to the negative electrode terminal through another connector 23.

This battery cell 20 may contain one or more electrode assemblies 22, according to actual operating requirements. As shown in FIG. 4, four separate electrode assemblies 22 are located in the battery cell 20.

A schematic representation of the construction of a battery cell 20 containing a pressure relief mechanism 213 according to another embodiment of the invention is shown in FIG. 5.

Housing 211, cover plate 212, electrode assembly 22, and connector 23 shown in FIG. 5 are comparable to the body 211, cover plate 212, electrode assembly 22, and connector 23 shown in FIG. 4 and will not be re-described in this document for the sake of brevity.

One wall of the battery cell 20, such as the first wall 21a shown in FIG. 5 may be optionally equipped with a pressure relief mechanism 213 . For ease of display, the first wall 21a is separated from the housing 211 in FIG. 5, but this does not mean that the underside of the body 211 has an opening. The pressure relief mechanism 213 is configured to be actuated to reduce the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

The pressure release mechanism 213 may be part of the first wall 21a or separated from the first wall 21a and fixed to the first wall 21a by welding, for example. When the pressure relief mechanism 213 is part of the first wall 21a, for example, the pressure relief mechanism 213 may be formed by providing a recess in the first wall 21a, and the thickness of the first wall 21a that corresponds to the recess is smaller than the thickness in other portions of the pressure relief mechanism 213 except for the extraction. The notch is the weakest point of the pressure relief mechanism 213 . When the excess gas generated by the battery cell 20 causes the internal pressure of the case 211 to rise to a threshold value, or the internal temperature of the battery cell 20 to rise to a threshold value due to the heat generated by the internal reaction of the battery cell 20, the reset mechanism 213 pressure may crack at the recessed location, thereby forming a bond between the spaces inside and outside of the case 211. The pressure and temperature of the gas is reduced by venting to the outside through a crack in the pressure relief mechanism 213, thereby preventing the battery cell 20 from exploding.

Optionally, in an embodiment of the invention, as shown in FIG. 5, in the case where the pressure release mechanism 213 is provided on the first wall 21a of the battery cell 20, the second wall of the battery cell 20 is provided with electrode leads 214 and is different from the first wall 21a.

Optionally, the second wall is located opposite the first wall 21a. For example, the first wall 21a may be the bottom wall of the battery cell 20, and the second wall may be the top wall of the battery cell 20, i.e., the cover plate 212.

Optionally, as shown in FIG. 5, the battery cell 20 may also include a support plate 24. The support plate 24 is between the electrode assembly 22 and the bottom wall of the case 211, can support the electrode assembly 22, and can also effectively prevent the electrode assembly 22 from colliding with rounded corners around the bottom wall of the case 211. In addition, the base plate 24 may be provided with one or more through holes, for example, the base plate may be provided with a plurality of evenly spaced through holes, or when the pressure relief mechanism 213 is provided on the bottom wall of the housing 211, the through holes are formed at locations corresponding to the mechanism. 213 pressure release, to promote the direction of liquid and gas. In particular, they can communicate the spaces of the upper surface and the lower surface of the base plate 24, and the gas generated inside the battery cell 20 and the electrolyte solution can freely pass through the base plate 24.

The pressure relief mechanism 213 and the electrode terminals 214 are provided on different walls of the battery cell 20, whereby, when the pressure relief mechanism 213 is actuated, the emissions from the battery cell 20 can be more distant from the electrode terminals 214, thereby reducing the effect of the emissions on the electrode terminals 214 and bus-like component and therefore increasing the safety of the battery.

In addition, when the electrode terminals 214 are provided on the cover plate 212 of the battery cell 20, the pressure relief mechanism 213 is provided on the bottom wall of the battery cell 20, so that when the pressure relief mechanism 213 is actuated, emissions from the battery cell 20 can be discharged to the bottom of the battery. 10. Thus, the risk due to emissions can be reduced by using a temperature control component at the bottom of the battery 10, and harm to users can be reduced because the bottom of the battery 10 is usually far away from users.

The pressure relief mechanism 213 may have various possible pressure relief designs, which are not limited to embodiments of the invention. For example, the pressure release mechanism 213 may be a temperature sensitive pressure release mechanism configured to melt when the internal temperature of the battery cell 20 provided with the pressure release mechanism 213 reaches a threshold value; and/or the pressure relief mechanism 213 may be a pressure sensitive pressure relief mechanism capable of cracking when the internal gas pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

In FIG. 6 schematically shows a battery 10 according to an embodiment of the invention. As shown in FIG. 6, battery 10 may include a battery cell 20 and a temperature control component 13.

The battery cell 20 includes a pressure relief mechanism 213, wherein the pressure relief mechanism 213 is provided in the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is configured to be actuated to reduce the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches the threshold. For example, battery cell 20 may be battery cell 20 in FIG. 5.

The temperature control component 13 is adapted to receive a fluid to adjust the temperature of a plurality of battery cells 20. In the event that the temperature of the battery cells 20 drops, the temperature control component 13 may contain a cooling medium to control the temperature of the plurality of battery cells 20. In this case, the temperature control component 13 may also be referred to as a coolant. component, cooling system or cooling plate, etc. In addition, the temperature control component 13 can also be used for heating, which is not limited to embodiments of the invention. Optionally, the fluid may flow in a circulating manner to achieve better temperature control results.

The first surface of the temperature control component 13 (the top surface shown in Fig. 6) is attached to the first wall 21a. That is, the wall of the battery cell 20 provided with the pressure relief mechanism 213 is attached to the temperature control component 13. The temperature control component 13 is capable of being damaged when the pressure relief mechanism 213 is actuated, whereby fluid is discharged from the inside of the temperature control component 13.

In an embodiment of the present invention, the first surface of the thermostatic component 13 is attached to the first wall 21a provided with a pressure relief mechanism 213 therein. So, when the pressure release mechanism 213 is actuated, emissions from the battery cell 20 are discharged towards the thermostatic component 13. Also, the thermostatic component 13 is configured to be damaged when the pressure relief mechanism 213 is actuated, whereby fluid is discharged from within the thermostatic component 13. Thus that the fluid can absorb heat from the battery cell 20 and reduce the temperature of the emissions. By cooling the fluid, the temperature of emissions from the battery cell 20 can be quickly reduced, whereby the risk caused by a malfunction of one battery cell 20 can be suppressed for the first time, the possibility of battery explosion can be reduced, and the safety of the battery can be improved.

Optionally, in an embodiment of the present invention, the thermal control component 13 may be further configured to be damaged by emissions emitted from the battery cell 20 when the pressure relief mechanism 213 is actuated, whereby the emissions pass through the thermal control component 13.

In particular, when the pressure release mechanism 213 is actuated, on the one hand, the emissions emitted from the battery cell 20 may damage the temperature control component 13 and pass through the temperature control component 13, moving away from the battery cell 20, and on the other hand, the fluid is discharged from within the thermostatic component 13, thus cooling the hot emissions. Because the temperature of the emissions is very high, regardless of whether the fluid is used to heat or cool the battery cell 20, the temperature of the fluid is lower than the temperature of the emissions, whereby the emissions can be cooled. So that the emissions can be cooled on the one hand, and discharged through the thermostatic component 13 on the other hand, and the risk they cause is minimized as much as possible, thus improving the safety of the battery.

In the embodiments of the present invention, various possible methods can be used to damage the thermostatic component 13 when the pressure release mechanism 213 is actuated, as described below as examples.

Optionally, as shown in FIG. 7, in an embodiment of the present invention, the temperature control component 13 is provided with a recess 134 therein, and the side surface of the recess 134 is capable of being damaged by ejections emitted from the battery cell 20, whereby fluid is discharged from within the temperature control component 13. For example, the side surface of the recess 134 made with the possibility of breakthrough and/or melting emissions, whereby the fluid is released from inside the thermostatic component 13.

Optionally, in an embodiment of the present invention, the bottom wall of the recess 134 is configured to be damaged by bursts when the pressure relief mechanism 213 is actuated, whereby the bursts pass through the thermostatic component 13. which the emissions pass through the thermostatic component 13.

In case recess 134 is used, when the pressure release mechanism 213 is actuated, the emissions from the battery cell 20 will rush into the recess 134. rushing into the recess 134 also melt the side surface of the recess 134, whereby the fluid is released from inside the thermostatic component 13, thereby cooling the hot emissions.

Optionally, in an embodiment of the present invention, the radial size of the recess 134 gradually decreases in the direction away from the pressure relief mechanism 213. That is, the side surface of the recess 134 is an inclined plane. This can increase the area of contact with blowouts and contribute to blowout damage. For example, the angle of inclination of the side surface of the recess 134 (the internal angle between the side surface and the plane in which the bottom wall is located) can be in the range from 15° to 85°.

Optionally, as shown in FIG. 7, in an embodiment of the present invention, in order to facilitate the passage of emissions through the thermostatic component 13, the bottom wall of the recess 134 is provided with a weakened zone 135, and the weakened zone 135 is configured to be damaged by the emissions when the pressure relief mechanism 213 is actuated, whereby the emissions pass through the weakened zone 135. .

Optionally, the weakened zone 135 may be located opposite the pressure relief mechanism 213. So when the pressure relief mechanism 213 is actuated, the surges can directly affect the weakened zone, opening the weakened zone 135.

Weakened zone 135 may be of various designs that facilitate damage by surges, which is not limited to embodiments of the present invention.

Optionally, a recess 134 may be provided in the first surface, that is, a recess 134 is provided in the surface of the thermostatic component 13 facing the first wall 21a. That is, the opening surface of the recess 134 faces the first wall 21a.

It should be understood that the opening of the recess 134 may also face away from the first wall 21a. In this case, the bottom wall of the recess 134 is also easily damaged by outliers.

The thermal control component 13 may form a fluid flow path of the thermally conductive material. Fluid flows in the flow path and conducts heat through the thermally conductive material to control the temperature of the battery cell 20. Optionally, the weakened zone may have only thermally conductive material and no fluid to form a relatively thin layer of thermally conductive material that is easily damaged by emissions. For example, the bottom wall of recess 134 may be a thin layer of thermally conductive material to form a weakened zone 135.

Optionally, as shown in FIG. 8a-8c, in an embodiment of the present invention, the temperature control component 13 may include a first heat transfer plate 131 and a second heat transfer plate 132. The first heat transfer plate 131 and the second heat transfer plate 132 define a flow path 133 for receiving fluid. The first heat transfer plate 131 is located between the first wall 21a and the second heat transfer plate 132 and is attached to the first wall 21a. The first section 131a of the first heat transfer plate 131 is recessed towards the second heat transfer plate 132 to form a recess 134, and the first section 131a is connected to the second heat transfer plate 132. Thus, the flow channel 133 is formed around the recess 134, while the bottom wall of the recess 134 is not a flow channel is formed, thus forming a weakened zone.

Optionally, the first heat transfer plate 131 or the second heat transfer plate 132 on the bottom wall of the recess 134 can also be removed to form a thinner weakened zone. For example, as shown in FIG. 8c, in the embodiment of the present invention, the first portion 131a is provided with the first through hole 136, and the radial dimension of the first through hole 136 is smaller than the radial dimension of the recess 134. That is, the first heat conduction plate 131 on the bottom wall of the recess 134 is removed, and the connection between the first heat conduction plate 131 and the second heat transfer plate 132 remains on the lower edge of the recess 134 to form a flow channel 133 around the recess 134.

Optionally, the second heat transfer plate 132, which corresponds to the first through hole 136, may also have a reduced thickness. That is, the thickness of the second heat transfer plate 132, which corresponds to the first through hole 136, is smaller than the thickness of the second heat transfer plate 132 in other areas, so that the weakened area is more easily damaged by surges. Optionally, a weakened recess may also be provided on the second heat transfer plate 132 corresponding to the first through hole 136.

In FIG. 9a-9c show schematic representations of the thermostatic component 13. As shown in FIG. 9a-9c, the first heat transfer plate 131 is recessed to form a recess 134, and the portion of the second heat transfer plate 132 corresponding to the recess 134 has no flow channel and is provided with a weakened recess 132a. Thus, after connecting the first heat transfer plate 131 and the second heat transfer plate 132 to each other, a weakened zone is formed on the bottom wall of the recess 134.

It should be understood that the thickness of the bottom wall of the recess 134 can be reduced by other methods of reducing the thickness. For example, a blind hole or a stepped hole may be formed in the first portion 131a of the first heat transfer plate 131; and/or a blind hole is formed in the second heat transfer plate 132.

Optionally, in an embodiment of the invention, the weakened zone 135 has a thickness that is less than or equal to 3 mm. For example, the weakened zone 135 may have a thickness of 1 mm or less.

In addition to the thinner weakened zone 135, the weakened zone 135, which is made of a low melting point material, can also be used to help it melt with bursts. That is, the weakened zone 135 may have a lower melting point than the rest of the thermal control component 13. For example, the material of the weakened zone 135 has a melting point below 400°C.

It should be understood that the weakened zone 135 may be made from a material with a low melting point and may have a smaller thickness. That is, the above two implementations may be implemented separately or together.

When actuated, the pressure relief mechanism 213 deforms to communicate the spaces inside and outside of the battery cell 20. For example, with respect to the pressure relief mechanism 213 using a notch, when actuated, the pressure relief mechanism 213 cracks at the notch and opens towards the two sides. Accordingly, the pressure relief mechanism 213 needs a certain deformation space. In an embodiment of the invention, the recess 134 is provided as a bypass chamber to allow the pressure relief mechanism 213 to open when the pressure relief mechanism 213 is actuated. The bypass chamber provides a deformation space for the pressure relief mechanism 213, whereby the pressure relief mechanism 213 deforms towards the thermostatic component 13 and cracks.

In the case of being used as a bypass chamber, the recess 134 should be positioned so as to meet the condition that the pressure relief mechanism 213 can be opened when actuated. In particular, the depth of the recess 134 depends on the size of the pressure relief mechanism 213. As one embodiment of the present invention, recess 134 has a depth greater than 1 mm. For example, the recess 134 may have a depth of 3 mm or more than 3 mm to further facilitate the opening of the pressure relief mechanism 213. The opening area of the recess 134 also depends on the area of the pressure relief mechanism 213 . In order to be able to open the pressure relief mechanism 213, the ratio of the opening area of the recess 134 to the area of the pressure relief mechanism 213 must be greater than a certain value. In addition, in order to promote damage to the side surface of the recess 134 by emissions, the ratio of the opening area of the recess 134 to the area of the pressure relief mechanism 213 must also be less than a certain value. For example, the ratio of the opening area of the recess 134 to the area of the pressure relief mechanism 213 can range from 0.5 to 2.

When the pressure release mechanism 213 is provided on the first wall 21a of the battery cell 20, at least a portion of the pressure release mechanism 213 may protrude outwardly from the first wall 21a. This may assist in mounting the pressure relief mechanism 213 and provide interior space for the battery cell 20. Optionally, as shown in FIG. 10, in an embodiment of the present invention, in the case of protruding at least a portion of the pressure relief mechanism 213 outwardly from the first wall 21a, the bypass chamber may be configured to receive at least a portion of the pressure relief mechanism 213. Thus, the first wall 21a of the battery cell 20 can be tightly attached to the surface of the temperature control component 13, which helps to fix the battery cell 20, and can also save space and improve the thermal control efficiency. Moreover, by actuating the pressure relief mechanism 213, the ejections from the battery cell 20 can be discharged towards the bypass chamber and away from the battery cell 20, thereby reducing the risk due to ejections, whereby the safety of the battery can be improved.

Optionally, in an embodiment of the invention, a portion of the first wall 21a around the pressure relief mechanism 213 protrudes outward, and the bypass chamber is configured to receive the protruding portion of the first wall 21a around the pressure relief mechanism 213. Similarly, in the case where a portion of the first wall 21a around the pressure relief mechanism 213 protrudes, the bypass chamber can allow the first wall 21a of the battery cell 20 to be tightly attached to the surface of the temperature control component 13, which helps to fix the battery cell 20 and can also save space. and improve the efficiency of thermal control.

In the above embodiments, the provision of the recess 134 makes it possible for the thermostatic component 13 to be damaged when the pressure release mechanism 213 is actuated. In addition to the recess 134, a through hole may also be provided to make it possible for the thermostatic component 13 to be damaged when the pressure release mechanism 213 is actuated.

Optionally, as shown in FIG. 11, in an embodiment of the present invention, the temperature control component 13 is provided with a second through hole 137, and the second through hole 137 is configured such that emissions emitted from the battery cell 20 can pass through the temperature control component 13 through the second through hole 137 when the mechanism 213 is driven. pressure relief.

Optionally, the second through hole 137 may be located opposite the pressure relief mechanism 213. So that when the pressure release mechanism 213 is actuated, emissions can pass directly through the thermostatic component 13 through the second through hole 137.

Optionally, in an embodiment of the present invention, in the case of providing the second through hole 137, a portion of the thermostatic component 13 around the second through hole 137 may be damaged by ejections from the battery cell 20, whereby the fluid is released from the inside of the thermostatic component 13.

In particular, when the pressure relief mechanism 213 is actuated, emissions from the battery cell 20 pass through the thermal control component 13 via the second through hole 137. In addition, the emissions also damage parts around the second through hole 137. For example, hot emissions melt the surrounding thermal control component 13, whereby the fluid is discharged from inside the thermostatic component 13, thereby cooling the hot emissions.

Optionally, in an embodiment of the present invention, the orifice wall of the second through hole 137 is configured to be damaged by surges, whereby fluid is discharged from within the thermostatic component 13.

When the pressure release mechanism 213 is actuated, the ejecta from the battery cell 20 rushes into the second through hole 137. the medium is discharged from within the thermostatic component 13, thereby cooling the emissions.

Optionally, the radial size of the second through hole 137 gradually decreases in the direction away from the pressure relief mechanism 213 . That is, the opening wall of the second through hole 137 is an inclined plane. This can increase the area of contact with blowouts and contribute to blowout damage.

Optionally, like the recess 134 above, the second through hole 137 must also be positioned so as to meet the condition that the pressure relief mechanism 213 can be opened when actuated. As an embodiment of the present invention, the opening area of the second through hole 137 depends on the area of the pressure relief mechanism 213 . In order to be able to open the pressure relief mechanism 213, the ratio of the opening area of the second through hole 137 and the area of the pressure relief mechanism 213 must be greater than a certain value. In addition, in order to facilitate damage to the wall with the opening of the second through hole 137 by emissions, the ratio of the opening area of the second through hole 137 and the area of the pressure relief mechanism 213 should be less than a certain value. For example, the ratio of the opening area of the second through hole 137 to the area of the pressure relief mechanism 213 is in the range of 0.5 to 2.

Optionally, in an embodiment of the present invention, the pressure relief mechanism 213 is located in the first wall 21a of the battery cell 20 provided with the pressure relief mechanism 213, wherein the first wall 21a is attached to the temperature control component 13, at least a portion of the pressure relief mechanism 213 protrudes outward from the first wall 21a, and the second through hole 137 is used to receive at least part of the pressure relief mechanism 213. Thus, the first wall 21a of the battery cell 20 can be tightly attached to the surface of the temperature control component 13, which helps to fix the battery cell 20, and can also save space and improve the thermal control efficiency. Moreover, by actuating the pressure release mechanism 213, the ejections from the battery cell 20 can be discharged towards the second through hole 137 and away from the battery cell 20, thereby reducing the risk due to ejections, whereby the safety of the battery can be improved.

Optionally, in the embodiment of the present invention, a portion of the first wall 21a around the pressure relief mechanism 213 protrudes outward, and the second through hole 137 is configured to receive an outwardly projecting portion of the first wall 21a around the pressure relief mechanism 213. In the case of protruding a portion of the first wall 21a around the pressure relief mechanism 213, the second through hole 137 can enable the first wall 21a of the battery cell 20 to be tightly attached to the surface of the temperature control component 13, which helps to fix the battery cell 20, saves space, and improves thermal control efficiency.

It should be understood that, in addition to equipping the thermostatic component 13 with a structure such that the thermostatic component 13 may be damaged when the pressure relief mechanism 213 is actuated, the pressure relief mechanism 213 can also be provided with a structure that causes the thermostatic component 13 to be damaged when actuated. operation of the pressure release mechanism 213.

Optionally, in an embodiment of the invention, the pressure relief mechanism 213 is equipped with a breaking device. The breaking device is configured to damage the thermostatic component 13 when the pressure release mechanism 213 is actuated, whereby fluid is released from inside the thermostatic component 13. For example, the breaking device may be a spike, but this is not limited to an embodiment of the invention.

Optionally, in an embodiment of the present invention, as shown in FIG. 12, the battery 10 may further comprise an electrical chamber 11a and a collection chamber 11b. The temperature control component 13 is configured to isolate the electrical chamber 11a from the collection chamber 11b. The so-called "isolation" in this document means a separation, which may or may not be airtight.

The electrical chamber 11a is used to accommodate a plurality of battery cells 20. The electrical chamber 11a may also be used to accommodate the tire component 12. The electrical chamber 11a provides a housing space for the battery cells 20 and the tire component 12, and the shape of the electrical chamber 11a may correspond to the plurality of battery cells 20 and the bus component 12.

Bus component 12 is configured to electrically connect a plurality of battery cells 20. Bus component 12 can realize electrical connection between battery cells 20 by connecting electrode terminals 214 of battery cells 20.

The collection chamber 11b is used to collect the emissions emitted from the battery cell 20 and the emissions from the thermostatic component 13 when the pressure release mechanism 213 is actuated.

In an embodiment of the invention, the thermostatic component 13 is used to isolate the electrical chamber 11a from the collection chamber 11b. In other words, the electrical chamber 11a for accommodating the plurality of battery cells 20 and the tire component 12 is separated from the collection chamber 11b for collecting emissions. Thus, when the pressure release mechanism 213 is actuated, emissions from the battery cells 20 enter the collection chamber 11b instead of the electrical chamber, or a small part of the emissions enter the electrical chamber 11a, so that the electrical connection in the electrical chamber 11a is not affected, and therefore, battery safety can be improved.

Optionally, in an embodiment of the present invention, the temperature control component 13 is configured to allow emissions emitted from the battery cell 20 to pass through the temperature control component 13 and enter the collection chamber 11b when the pressure release mechanism 213 is actuated.

Optionally, in an embodiment of the invention, the temperature control component 13 has a wall that is common to the electrical chamber 11a and the collection chamber 11b. As shown in FIG. 12, the temperature control component 13 can be both the wall of the electrical chamber 11a and the wall of the collection chamber 11b. In other words, the temperature control component 13 (or a part thereof) can be directly used as a wall that is common to the electrical chamber 11a and the collection chamber 11b. Thus, the emissions from the battery cell 20 can enter the collection chamber 11b through the temperature control component 13. In addition, due to the presence of the temperature control component 13, the emissions can be isolated from the electrical chamber 11a as much as possible, thus reducing the risk due to emissions and improving battery safety. .

Optionally, in an embodiment of the present invention, the electrical chamber 11a may be comprised of a shell having an opening and a temperature control component 13. For example, as shown in FIG. 13, the shell 110 has an opening (lower side opening in FIG. 14). The opening shell 110 is a semi-closed opening chamber in communication with the outside, and the thermal control component 13 closes the opening to form the chamber, i.e. electrical chamber 11a.

Optionally, the shell 110 may be composed of several parts. For example, as shown in FIG. 14, the shell 110 may include a first part 111 and a second part 112. The two sides of the second part 112 have openings, respectively. The first part 111 closes the opening on one side of the second part 112, and the temperature control component 13 closes the opening on the other side of the second part 112, thus forming the electrical chamber 11a.

The embodiment of the invention according to FIG. 14 can be obtained by improvements based on FIG. 2. Specifically, the bottom wall of the second portion 112 in FIG. 2 can be replaced by the temperature control component 13, and the temperature control component 13 functions as a wall of the electrical box 11a, thereby forming the electrical box 11a in FIG. 14. In other words, the bottom wall of the second part 112 in FIG. 2 can be removed. That is, an annular wall with two sides with openings is formed, and the first part 111 and the temperature control component 13 close the openings on the two sides of the second part 112, respectively, to form a chamber, namely, an electrical chamber 11a.

Optionally, in an embodiment of the invention, the collection chamber 11b may consist of a temperature control component 13 and a protective element. For example, as shown in FIG. 15, the battery 10 further includes a security element 115. The security element 115 is configured to protect the temperature control component 13, and the security element 115 and the temperature control component 13 form a collection chamber 11b.

The collection chamber 11b formed by the protective element 115 and the temperature control component 13 does not occupy a space that can accommodate a battery cell. Therefore, a large-space collection chamber 11b can be provided, which can effectively collect and absorb emissions and reduce the risk caused by them as a result.

Optionally, in an embodiment of the invention, a fluid such as a cooling medium or a fluid-accommodating component may be additionally provided in the collection chamber 11b to further cool the emissions entering the collection chamber 11b.

Optionally, in an embodiment of the invention, the collection chamber 11b may be a sealed chamber. For example, the connection between the protective element 115 and the thermostatic component 13 may be sealed with a sealing element.

Optionally, in an embodiment of the invention, the collection chamber 11b may not be a sealed chamber. For example, the collection chamber 11b may be in communication with air, and thus part of the emissions may be further discharged outside the collection chamber 11b.

In the above embodiment, the temperature control component 13 closes the opening of the shell 110 to form the electrical chamber 11a, and the temperature control component 13 and the protective member 115 form the collection chamber 11b. Optionally, the temperature control component 13 can also directly divide the closed shell into an electrical chamber 11a and a collection chamber 11b.

For example, as shown in FIG. 16, in an embodiment of the invention, the temperature control component 13 is located inside the shell 110 and separates the interior of the shell 110 into an electrical chamber 11a and a collection chamber 11b. That is, the closed shell 110 forms a chamber inside, and the temperature control component 13 divides the chamber inside the shell 110 into two chambers, namely, the electrical chamber 11a and the collection chamber 11b.

Since the electrical box 11a needs a relatively large space to accommodate a plurality of battery cells 20, etc., the temperature control component 13 can be provided near a certain wall of the shell 110 to isolate the relatively large space electrical box 11a from the relatively small space collection chamber 11b.

Optionally, as shown in FIG. 17, in an embodiment of the invention, the shell 110 may include a first part 111 and a second part 112. The side of the second part 112 includes an opening to form a semi-closed structure. The semi-closed design is a chamber with an opening. The temperature control component 13 is provided inside the second part 112, and the first part 111 closes the opening of the second part 112. In other words, the temperature control component 13 can first be placed in the semi-closed second part 112 to isolate the collection chamber 11b, and then the first part 111 closes the opening of the second part 112 to form an electrical chamber 11a.

Optionally, in an embodiment of the invention, the electrical chamber 11a is isolated from the collection chamber 11b by a temperature control component 13. That is, the collection chamber 11b is not in communication with the electrical chamber 11a, and liquid or gas, etc. in the collection chamber 11b cannot flow into the electrical chamber 11a, so that the electrical chamber 11a can be better protected.

In FIG. 18 is an exploded view of a battery 10 according to an embodiment of the present invention. In the embodiment of the invention shown in FIG. 18, the thermostatic component 13 is provided with a recess 134 and forms a collection chamber together with the protective element 115.

To describe each component in battery 10, reference may be made to the above embodiments of the invention, which will not be re-described herein for the sake of brevity.

In an embodiment of the invention, a power consuming device is further provided, which may include the battery 10 in each of the above embodiments. Optionally, the power consuming device may be a vehicle 1, a ship or a spacecraft.

The battery and the power consuming device according to the embodiments of the present invention have been described above, and the method and apparatus for manufacturing a battery according to the embodiments of the invention will be described below. For parts that are not described in detail, reference is made to the above embodiments.

In FIG. 19 shows a flowchart of a method 300 for manufacturing a battery according to an embodiment of the present invention. As shown in FIG. 19, method 300 may include:

step 310, providing a battery cell 20, wherein the battery cell 20 includes a pressure relief mechanism 213, wherein the pressure relief mechanism 213 is disposed in the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is actuable to reduce the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value;

step 320, providing a temperature control component 13, while the temperature control component 13 is used to store the fluid; And

step 330, attaching the first surface of the thermostatic component 13 to the first wall 21a, wherein the thermostatic component 13 can be damaged when the pressure release mechanism 213 is actuated, as a result of which the fluid is released from the inside of the thermostatic component 13.

In FIG. 20 is a block diagram of a battery manufacturing apparatus 400 according to an embodiment of the present invention. As shown in FIG. 20, the battery manufacturing apparatus 400 may include: a provisioning module 410 and a setting module 420.

The provisioning module 410 is configured to: provide a battery cell 20, wherein the battery cell 20 includes a pressure relief mechanism 213, wherein the pressure relief mechanism 213 is located in the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is configured to actuate to relieve the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value; and providing a temperature control component 13, wherein the temperature control component 13 is used to contain the fluid.

The installation module 420 is configured to: attach the first surface of the thermostatic component 13 to the first wall 21a, wherein the thermostatic component 13 can be damaged when the pressure release mechanism 213 is actuated, as a result of which the fluid is released from the inside of the thermostatic component 13.

Finally, it should be noted that the above embodiments are used only to illustrate and not limit the technical solutions of the present application. Although the present application has been illustrated in detail with reference to the above embodiments of the invention, it should be clear to those skilled in the art that they may still modify the technical solutions described in the above embodiments of the invention, or make equivalent substitutions for some of the technical features described in this document, but these changes or replacements can be made to the corresponding technical solutions without departing from the essence and scope of the technical solutions of the embodiments of the invention.

Claims (45)

1. Battery (10) containing: a battery cell (20) containing a pressure relief mechanism (213), wherein the pressure relief mechanism (213) is located in the first wall (21a) of the battery cell (20), and the pressure relief mechanism (213) is configured to be actuated to reducing the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value; And a thermostatic component (13) for containing a fluid for adjusting the temperature of the battery cell (20); moreover, the first surface of the thermostatic component (13) is attached to the first wall (21a), and the thermostatic component (13) is made with the possibility of damage when the pressure relief mechanism (213) is actuated, as a result of which the fluid is released from the inside of the thermostatic component (13). 2. The battery according to claim 1, in which the thermostatic component (13) is configured to be damaged by emissions emitted from the battery cell (20) when the pressure relief mechanism (213) is actuated, as a result of which the emissions pass through the thermostatic component (13) . 3. The battery according to claim 1, in which the thermostatic component (13) is provided with a recess (134) located therein, and the side surface of the recess (134) is capable of being damaged by emissions emitted from the battery cell (20), as a result of which the fluid is released from inside the thermostatic component (13); the bottom wall of the recess (134) is designed to be damaged by emissions when the pressure release mechanism (213) is actuated, as a result of which the emissions pass through the thermostatic component (13). 4. The battery according to claim 3, in which the side surface of the recess (134) is made with the possibility of breakthrough and/or melting by emissions, as a result of which the fluid is released from the inside of the thermostatic component (13); and/or the bottom wall of the recess (134) is made with the possibility of breakthrough and/or melting by emissions, as a result of which the emissions pass through the thermostatic component (13); and/or the radial size of the recess (134) gradually decreases in the direction away from the pressure relief mechanism (213). 5. The battery according to claim. 3, in which the lower wall of the recess (134) is provided with a weakened zone (135), while the weakened zone (135) is made with the possibility of damage by emissions when the pressure relief mechanism (213) is actuated, as a result of which the emissions pass through the weakened zone (135); the weakened zone (135) has a thickness that is less than or equal to 3 mm; the weakened zone (135) has a lower melting point than the rest of the thermostatic component (13); the material of the weakened zone (135) has a melting point below 400 °C. 6. Battery according to any one of paragraphs. 3 or 4, in which the recess (134) is made in the first surface; thermostatic component (13) contains the first heat-conducting plate (131) and the second heat-conducting plate (132), wherein the first heat-conducting plate (131) is located between the first wall (21a) and the second heat-conducting plate (132) and attached to the first wall (21a) , the first section (131a) of the first heat transfer plate (131) is recessed towards the second heat transfer plate (132) to form a recess (134), and the first section (131a) is connected to the second heat transfer plate (132). 7. The battery according to claim 6, in which the first section (131a) is provided with a first through hole (136), and the radial size of the first through hole (136) is smaller than the radial size of the recess (134); the thickness of the second heat transfer plate (132), which corresponds to the first through hole (136), is less than the thickness of the second heat transfer plate (132) in other areas. 8. Battery according to any one of paragraphs. 3 or 4, in which the recess (134) is made as a bypass chamber to allow the opening of the pressure relief mechanism (213) when the pressure relief mechanism (213) is actuated. 9. The battery according to claim 8, in which the depth of the recess (134) depends on the size of the pressure relief mechanism (213); recess (134) has a depth of more than 1 mm; and/or the opening area of the recess (134) depends on the area of the pressure relief mechanism (213); the ratio of the area of the opening of the recess (134) and the area of the pressure relief mechanism (213) is in the range from 0.5 to 2. 10. The battery of claim 8, wherein at least a portion of the pressure relief mechanism (213) protrudes outward from the first wall (21a) and the bypass chamber is configured to receive at least a portion of the pressure relief mechanism (213); and/or a portion of the first wall (21a) around the pressure relief mechanism (213) protrudes outward, and the bypass chamber is configured to accommodate the protruding portion of the first wall (21a) around the pressure relief mechanism (213). 11. The battery according to claim. 1, in which the thermostatic component (13) is provided with a second through hole (137) located therein, while the second through hole (137) is made so that emissions emitted from the battery cell (20) can pass through the thermostatic component (13) through the second through hole (137) when the pressure relief mechanism (213) is actuated. 12. The battery according to claim 11, in which the wall with the opening of the second through hole (137) is made with the possibility of damage by emissions, as a result of which the fluid is released from the inside of the thermostatic component (13); the wall with the hole of the second through hole (137) is made with the possibility of breakthrough and/or melting by emissions, as a result of which the fluid is released from inside the thermostatic component (13). 13. Battery according to any one of paragraphs. 11 or 12, in which the radial size of the second through hole (137) gradually decreases in a direction away from the pressure relief mechanism (213); and/or the opening area of the second through hole (137) depends on the area of the pressure relief mechanism (213); the ratio of the opening area of the second through hole (137) and the area of the pressure relief mechanism (213) is in the range from 0.5 to 2. 14. Battery according to any one of paragraphs. 11 or 12, wherein at least a portion of the pressure relief mechanism (213) protrudes from the first wall (21a), and the second through hole (137) is used to receive at least a portion of the pressure relief mechanism (213); and/or the part of the first wall (21a) around the pressure relief mechanism (213) protrudes outward, and the second through hole (137) is used to receive the protruding portion of the first wall (21a) around the pressure relief mechanism (213). 15. Battery according to any one of paragraphs. 1-4, in which the pressure relief mechanism (213) is provided with a breaking device, while the breaking device is used to damage the thermostatic component (13) when actuating the pressure relief mechanism (213), as a result of which the fluid is released from the inside of the thermostatic component (13) . 16. Battery according to any one of paragraphs. 1-4, which additionally contains: an electrical chamber (11a) for accommodating a plurality of battery cells (20); And a collection chamber (11b) for collecting emissions emitted from the battery cells (20) and emissions from the thermostatic component (13) when the pressure relief mechanism (213) is actuated; wherein the thermostatic component (13) is configured to isolate the electrical chamber (11a) from the collection chamber (11b). 17. The battery according to claim 16, in which the thermostatic component (13) has a wall that is common to the electrical chamber (11a) and the collection chamber (11b); and/or additionally contains a protective element (115), while the protective element (115) is configured to protect the thermostatic component (13), while the protective element (115) and the thermostatic component (13) form a collection chamber (11b); and/or the electrical chamber (11a) is isolated from the collection chamber (11b) by a thermostatic component (13); and/or the thermostatic component (13) is configured to allow emissions emitted from the battery cell (20) to pass through the thermostatic component (13) and enter the collection chamber (11b) when the pressure relief mechanism (213) is actuated. 18. Battery according to any one of paragraphs. 1-4, in which the second wall of the battery cell (20) is provided with an electrode terminal and the second wall is different from the first wall (21a); the second wall is located opposite the first wall (21a). 19. Power-consuming device containing a battery (10) according to any one of paragraphs. 1-18.

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