RU2808229C1 - Battery, power device, method and device for battery manufacturing - Google Patents

Abstract

FIELD: batteries.

SUBSTANCE: invention relates to a battery, an energy-consuming device, a method and a device for manufacturing a battery. The battery comprises: a battery cell including a pressure relief mechanism, wherein the pressure relief mechanism is disposed on the first wall of the battery cell, and the pressure relief mechanism is operable to reduce internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a threshold value; and a temperature control component configured to receive a fluid for adjusting the temperature of the battery cell; wherein the first surface of the thermal control component is attached to the first wall of the battery cell, wherein the thermal control component is configured to be damaged by emissions discharged from the battery cell upon activation of the pressure release mechanism, causing the emissions to pass through the temperature control component.

EFFECT: increasing the battery safety.

36 cl, 20 dwg

Description

Field of technology

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 efficient development of the automotive industry. In this case, electric vehicles have become an important part of the efficient development of the automobile 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 battery performance, the issue of safety also cannot be ignored. If battery safety cannot be ensured, the batteries should not be used. Therefore, improving battery safety is a technical challenge that urgently needs to be addressed in battery technology.

Disclosure of the Invention

In embodiments of the invention, a battery, a power consuming device, and a method and apparatus for manufacturing a battery are provided, which can improve the safety of the battery.

In a first aspect, there is provided a battery comprising: a battery cell including a pressure relief mechanism, wherein the pressure relief mechanism is disposed on a first wall of the battery cell, and the pressure relief mechanism is operable to reduce internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; and a temperature control component configured to receive a fluid for adjusting the temperature of the battery cell; wherein a first surface of the thermal control component is attached to a first wall of the battery cell, wherein the thermal control component is configured to be damaged by emissions discharged from the battery cell upon activation of the pressure release mechanism, causing the emissions to pass through the temperature control component.

In an embodiment of the invention, a first surface of the temperature control component is attached to a first wall provided with a pressure relief mechanism such that when the pressure relief mechanism is activated, emissions from the battery cell are released toward the temperature control component; in addition, the temperature control component is configured to be damaged by emissions released from the battery cell when the pressure relief mechanism is activated, causing the emissions to pass through the temperature control component. In this way, emissions can pass through the thermal control component and be quickly released away from the battery cell, thereby reducing the risk caused by emissions and increasing battery safety.

In some embodiments of the invention, the temperature control component is provided with a weakened zone, and the weakened zone is configured to be damaged by emissions when the pressure relief mechanism is activated, causing the emissions to pass through the weakened zone.

By providing a weakened zone, it is convenient for emissions to pass through the temperature control component.

In some embodiments, the weakened area is located opposite the pressure relief mechanism. Thus, when the pressure release mechanism is activated, the emissions can directly impact the weakened area and open it.

In some embodiments, the temperature control component is provided with a recess located opposite the pressure relief mechanism, with the bottom wall of the recess defining a weakened area.

In some embodiments of the invention, the recess is located on a surface of the temperature control component facing the first wall.

In some embodiments of the invention, the thermal control component includes a first thermal conductive plate and a second thermal conductive plate, wherein the first thermal conductive plate is located between the first wall and the second thermal conductive plate and is attached to the first wall, the first portion of the first thermal conductive plate is recessed towards the second thermal conductive plate to form a recess, and the first portion is connected to the second heat conduction plate.

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

In some embodiments of the invention, the thickness of the second thermal conductive plate that corresponds to the through hole is less than the thickness of the second thermal conductive plate in other areas. Thus, the weakened area is more easily damaged by emissions.

In some embodiments, 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 temperature control component.

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

In some embodiments of the invention, a portion of the temperature control component around the weakened area is configured to be damaged by emissions such that fluid is released from the interior of the temperature control component.

When the pressure release mechanism is activated, the thermoregulatory component is damaged and fluid is released from the interior of the thermoregulatory component. This can absorb heat from the battery cell and reduce the temperature of the emissions, thereby reducing the risk caused by emissions.

In some embodiments, the side surface of the recess is configured to be damaged by emissions, causing fluid to be released from the interior of the temperature control component.

When a recess is used, when the pressure release mechanism is activated, the discharge from the battery cell is directed into the recess. Since the bottom wall of the recess is relatively weak, emissions will damage the bottom wall of the recess and enter the collection chamber. In addition, the emissions flowing into the recess also melt the side surface of the recess, causing fluid to be released from the interior of the temperature control component, thereby cooling the hot emissions.

In some embodiments, the radial size of the recess is gradually reduced in a direction away from the pressure relief mechanism. This can increase the area of contact with emissions and contribute to damage from emissions.

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

The bypass chamber forms a deformation space for the pressure relief mechanism, causing the pressure relief mechanism to deform in a direction toward the temperature control component and crack.

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

In some embodiments of the invention, the recess is greater than 1 mm deep.

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

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

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

In this way, the first wall of the battery cell can be firmly attached to the surface of the temperature control component, which is conducive to fixing the battery cell, and can also save space and improve the efficiency of temperature control. Moreover, when the pressure relief mechanism is activated, the discharge from the battery cell can be released towards the bypass chamber and away from the battery cell, thereby reducing the risk caused by the discharge, whereby the safety of the battery can be improved.

In some embodiments, a portion of the first wall around the pressure relief mechanism projects outwardly, and the bypass chamber is configured to accommodate the outwardly projecting portion of the first wall around the pressure relief mechanism.

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

The pressure relief mechanism and the electrode terminals are located on different walls of the battery cell, whereby when the pressure relief mechanism is activated, the emissions from the battery cell can be further away from the electrode terminals, thereby reducing the impact of the emissions on the electrode terminals and the busbar component, and, hence improves battery safety.

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

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

In some embodiments of the invention, the battery further comprises: an electrical chamber configured to accommodate a plurality of battery cells; and a collection chamber configured to collect emissions when the pressure relief mechanism is activated; wherein the temperature control component is configured to isolate the electrical chamber from the collection chamber.

The electrical chamber for housing the battery cells is separated by a thermal control component from the collection chamber for collecting emissions. When the pressure relief mechanism is activated, the emissions from the battery cells enter the collection chamber rather than the electrical chamber, or a small amount of emissions enters the electrical chamber, so that the electrical connection in the electrical chamber is not affected, and therefore the safety of the battery can be improved .

In some embodiments, the temperature control component has a wall that is common to the electrical chamber and the collection chamber.

Since the thermal control component has a wall that is common to the electrical chamber and the collection chamber, emissions can be isolated as much as possible from the electrical chamber, thereby reducing the risk caused by emissions and increasing battery safety.

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

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

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

The collection chamber is not in communication 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 of the invention, the temperature control component is configured to be damaged by emissions when the pressure relief mechanism is activated, causing the emissions to pass through the temperature control component and enter the collection chamber.

In the second aspect, a power consuming device is provided containing the battery provided in the first aspect.

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

In a third aspect, a method of manufacturing a battery is provided, the method comprising: providing a battery cell, wherein the battery cell includes a pressure relief mechanism, wherein the pressure relief mechanism is disposed on a first wall of the battery cell, and the pressure relief mechanism is operable to reduce internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; providing a presence of a thermoregulating component, wherein the thermoregulating component is configured to accommodate a fluid; and attaching a first surface of the temperature control component to the first wall of the battery cell, wherein the temperature control component is configured to be damaged by emissions discharged from the battery cell when the pressure relief mechanism is activated, causing the emissions to pass through the temperature control component.

In some embodiments of the invention, the temperature control component is provided with a weakened zone, and the weakened zone is configured to be damaged by emissions when the pressure relief mechanism is activated, causing the emissions to pass through the weakened zone.

In some embodiments, the temperature control component is provided with a recess located opposite the pressure relief mechanism, with the bottom wall of the recess defining a weakened area.

In some embodiments of the invention, the thermal control component includes a first thermal conductive plate and a second thermal conductive plate, wherein the first thermal conductive plate is located between the first wall and the second thermal conductive plate and is attached to the first wall, the first portion of the first thermal conductive plate is recessed towards the second thermal conductive plate to form a recess, and the first portion is connected to the second heat conduction plate.

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

In a fourth aspect, an apparatus for manufacturing a battery is provided, the apparatus comprising modules for executing the method provided in the above-described third aspect.

The accompanying drawings described herein are intended to provide further understanding of this application and constitute a part of this application. The illustrative embodiments of the invention and the description thereof are intended to illustrate the present application and do not constitute an undue limitation of the present application. On graphic materials:

Brief description of drawings

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

in fig. 2 is a schematic diagram of a battery structure according to an embodiment of the invention;

in fig. 3 is a schematic diagram showing the structure 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 invention;

in fig. 6-8 schematically illustrate battery structures in accordance with some embodiments of the invention;

in fig. 9a is a schematic top view of a battery according to an embodiment of the invention;

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

in fig. 9c shows part B of the battery of FIG. 9b enlarged;

in fig. 10a is a schematic perspective view of a temperature control component according to an embodiment of the invention;

in fig. 10b is a schematic view of the temperature control component of FIG. 10a in cross section along line A-A;

in fig. 10c shows an enlarged view of a temperature control component according to an embodiment of the invention;

in fig. 11-17 schematically illustrate a battery design in accordance with 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 flowchart 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.

Carrying out the invention

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 drawings for the embodiments of the invention. It will be appreciated that the described embodiments represent some, and not all, embodiments of the invention. All other embodiments obtained without creative effort by one skilled in the art based on the embodiments of the invention shall be within the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as terms commonly understood by those skilled in the art to which this application pertains. The terms used in the description of this application are solely for the purpose of describing specific embodiments and are not intended to limit this application. The words “comprising” and “having” and any variations thereof in the specification and claims of this application and 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 this application, as well as in the above graphics, are used to distinguish different objects and not to describe a specific order or primary-minor relationship.

The expression "embodiments" as used herein 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 in different places in the description does not necessarily refer to the same embodiment or to a separate or alternative embodiment to the exclusion of another embodiment. Those skilled in the art will appreciate, both explicitly and implicitly, that the embodiment described herein may be combined with another embodiment.

It should be noted that in the specification of this application, unless expressly indicated and defined otherwise, the words “install”, “connect”, “connection” and “attachment” are to be understood in a broad sense, for example, they can mean a fixed connection, a detachable connection or integrated connection; may denote a direct connection, may also denote an indirect connection through an intermediate element, or may denote a connection between the internal parts of two elements. One skilled in the art may understand the specific meanings of the above words in this application according to specific circumstances.

In this application, the term "and/or" refers only to a relationship describing related objects, which means that there are three possible relationships, for example, "A and/or B" can mean that there are three cases: only A exists; there is both A and B; and only B exists. In addition, the symbol "/" in this application generally indicates that the related objects before and after this symbol are in an "or" relationship.

In this 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 lithium ion secondary battery, a lithium ion primary 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 options. implementation of the invention. The battery cell may have a cylindrical, flat, cuboid 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 stacked 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 mentioned herein may include a battery module or a battery pack, etc. The battery typically includes a housing for enclosing one or more battery cells. The casing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

The battery cell contains an electrode assembly and an electrolyte solution, and the electrode assembly is composed of a positive sheet electrode, a negative sheet electrode and an insulating film. The operation of a battery cell is generally based on the movement of metal ions between a positive sheet electrode and a negative sheet electrode. The positive sheet electrode includes 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 susceptor, and a susceptor not covered with the positive electrode active material layer protrudes from the susceptor coated with the positive electrode active material layer and is used as a positive electrode contact 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, ternary lithium or lithium manganate, etc. The negative sheet electrode contains 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 susceptor, and a susceptor not covered by the negative electrode active material layer protrudes from the susceptor coated with the negative electrode active material layer and is used as a contact terminal of the negative electrode. 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. 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 can 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. As battery technology advances, many design factors must be considered, such as energy density, cycle limit, discharge capacity, time to full charge or discharge, and other performance parameters. Apart from this, battery safety also needs to be considered.

For a battery cell, the main safety hazards come from the charging and discharging processes, and suitable design taking into account the ambient temperature is also necessary. To effectively avoid unnecessary losses, at least triple protection measures are generally used for the battery cell. In particular, the protective measures include at least a switching element, an appropriately selected insulating film material and a pressure relief mechanism. A 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 value. The insulating film is designed to isolate the positive sheet electrode from the negative sheet electrode, and can automatically eliminate micron-sized (or even nano-sized) micropores attached to the insulating film when the temperature rises to a certain value, thereby preventing the passage of metal ions through the insulating film and stopping internal reaction of the battery cell.

A pressure relief mechanism refers to a cell or component that is actuated to reduce internal pressure or temperature when the internal pressure or temperature of a battery cell reaches a predetermined threshold value. The design of the threshold value 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 configured as an anti-explosion valve, an air valve, a pressure relief valve, or a safety valve, etc., and may particularly include 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 relief mechanism operates, or the weakened structure formed in the pressure relief mechanism is damaged, thereby forming an opening or channel for reducing the internal pressure or temperature.

“Actuating” as referred to herein means that the pressure relief mechanism operates or is activated to 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, cracking, breaking, rupturing or opening, etc., of at least a portion of the pressure relief mechanism. When the pressure release mechanism is activated, the high temperature and high pressure substances inside the battery cell are released as emissions from the actuation position. Thus, provided the pressure or temperature is controlled, the battery cell pressure can be reduced while avoiding potential more serious accidents.

Battery cell emissions mentioned herein include, but are not limited to: electrolyte solution, dissolved or broken positive and negative electrode sheets, insulating film fragments, high temperature and high pressure gas generated by reaction, flame, etc.

The pressure relief mechanism on the battery cell has a major impact on battery safety. For example, when short circuits, overcharging and other phenomena occur, they can lead to thermal runaway inside the battery cell, which causes a sudden increase in pressure or temperature. In this case, the internal pressure and temperature can be reduced by venting to the outside by operating the pressure relief mechanism to prevent the battery cell from exploding and burning.

In current pressure relief mechanism designs, the primary goal is to reduce the high pressure and high temperature inside the battery cell, i.e., release the emissions to the outside of the battery cell. However, to provide output voltage or current to a battery often requires a plurality of battery cells electrically connected to each other via a busbar component. The emissions released from the inside of a battery cell may short circuit other battery cells. For example, when released metal debris electrically connects two components in a busbar, the battery may short circuit, thereby presenting a potential safety hazard. In addition, high temperature and high pressure emissions are discharged towards the pressure relief mechanism provided in the battery cell, and in particular may be discharged towards the portion where the pressure relief mechanism is actuated. The force and destructive effect of such emissions may be significant or may even be sufficient to breach one or more structures in that direction, causing additional safety concerns.

From this point of view, in an embodiment of the invention, a technical solution is provided in which the wall of a battery cell, which is provided with a pressure relief mechanism, is attached to a temperature control component, and when the pressure relief mechanism is activated, emissions discharged from the battery cell pass through the temperature control component and quickly move away from the battery cell, thereby reducing the risk due to emissions, whereby battery safety can be improved.

The temperature control component is configured to receive fluid for adjusting 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 the plurality of battery cells. In the event of cooling or lowering the temperatures of the battery cells, the temperature control component is configured to receive a cooling fluid to lower the temperatures of the plurality of battery cells. In this case, the thermal control component may also be called a cooling component, a cooling system or a cooling plate, etc. The fluid enclosed by the thermal control component may also be called a cooling medium or a cooling fluid, and in particular may be called a cooling liquid or a cooling 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 invention. 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 configured to accommodate a plurality of battery cells and a busbar component. The electrical chamber may be sealed or non-sealed. The electrical chamber provides installation space for the battery cells and the busbar component. In some embodiments, the battery cell retaining structure may also be provided in the electrical chamber. The shape of the electrical chamber can be determined in accordance with a plurality of battery cells and a busbar component that are housed therein. In some embodiments, the electrical chamber may be a cube with six walls. Since the battery cells in the electrical chamber produce a higher output voltage through electrical connection, the electrical chamber can also be called a "high voltage chamber".

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

The collection chamber referred to herein is configured to collect emissions and may be sealed or non-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 called the "low voltage chamber". Optionally or additionally, the collection chamber may also contain a liquid, such as a cooling medium, or a liquid receiving component may also be provided in the collection chamber to further cool the emissions entering the collection chamber. In addition, the gas or liquid in the collection chamber optionally flows in a circulating manner.

All the technical solutions described in the embodiments of the invention are applicable in various devices using batteries, such as mobile phones, portable devices, laptops, electric vehicles, electronic toys, power tools, electric vehicles, ships and spacecraft. For example, space vehicles include airplanes, rockets, space shuttles, spacecraft, etc.

It should be understood that the technical solutions described in the embodiments of the invention are not only applicable to the above devices, but are 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 structure of a vehicle 1 according to an embodiment of the invention. The vehicle 1 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a battery-electric vehicle, a hybrid vehicle, or a range-extended vehicle, or the like. The motor 40, the controller 30, and the battery 10 may be configured within the vehicle. means 1, and the controller 30 is configured to control the battery 10 to supply power to the engine 40. For example, the 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 energy 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 required operating power to the vehicle 1 during starting, navigation, and operation. In another embodiment of the invention, the battery 10 may be used not only as an operating power source for the vehicle 1, but also as a drive power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide drive power for the vehicle 1.

To meet different energy requirements, the battery may contain a plurality of battery cells, and 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 called a battery pack. Optionally, a plurality of battery cells may first be connected in series, in parallel, or in series and parallel to form battery modules, and then multiple battery modules are connected in series, in parallel, or in series and 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 structural representation of a battery 10 according to an embodiment of the invention, the battery 10 may include a plurality of battery cells 20. The battery 10 may further include a casing (or shell) the interior of which is a hollow structure, and a plurality of battery cells 20 housed in a 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 secured together. The shapes of the first portion 111 and the second portion 112 may be determined in accordance with the shape of the combined plurality of battery cells 20, and each of the first portion 111 and the second portion 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 of them has only one opening surface, and the opening of the first part 111 is located opposite the opening of the second part 112. The first part 111 and the second part 112 are secured to each other each other so as to form a casing with a closed chamber. A plurality of battery cells 20 are combined through a parallel connection, or a series connection, or a series-parallel connection, and then placed in a housing formed by bonding the first portion 111 to the second portion 112.

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

According to different energy requirements, any number of battery cells 20 can be specified. A plurality of battery cells 20 can be connected in series, in parallel, or in series and 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 ease of installation, 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. Figure 3 shows an example of a battery module. The battery may contain a plurality of battery modules, and these battery modules may be connected in series, in parallel, or in series and parallel.

In fig. 4 schematically shows the structure of a battery cell 20 according to an embodiment of the invention. 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 body 211 and the cover plate 212 form a shell or battery box 21. Each of the wall of the body 211 and the cover plate 212 is considered a wall of the battery cell 20. The shape of the body 211 corresponds to the shape of one or more electrode assemblies 22 after being combined. For example, housing 211 may be a hollow cuboid or cube or cylinder, and one surface of housing 211 has an opening such that one or more electrode assemblies 22 may be housed within housing 211. For example, where housing 211 is a hollow cuboid or cube , one plane of the housing 211 is an opening surface, that is, the plane does not have a wall, so that the spaces inside and outside the housing 211 are in communication with each other. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an opening surface, that is, the end surface has no wall, so that the spaces inside and outside the housing 211 are in communication 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 the two electrode terminals 214 may be provided on the cover plate 212. The coating plate 212 is generally shaped like a flat plate, and the two electrode terminals 214 are fixed to the surface of the flat plate being the cover plate 212. The two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. Each electrode terminal 214 is suitably equipped with a connecting member 23, also called a current collecting member 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 has 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. A first electrode terminal 221a of one or more electrode assemblies 22 is connected to one electrode terminal via one connecting member 23, and a second electrode terminal 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 23. For example, a positive electrode terminal 214a is connected to the positive electrode terminal via one connecting member 23, and the negative electrode terminal 214b is connected to the negative electrode terminal via another connecting member 23.

This battery cell 20 may contain a single or multiple 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 design of a battery cell 20 including 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 connecting member 23 in FIG. 5 are comparable to housing 211, cover plate 212, electrode assembly 22, and connector 23 in FIG. 4 and will not be described again herein for the sake of brevity.

One wall of the battery cell 20, such as the first wall 21a shown in FIG. 5 may be additionally 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 bottom side of the housing 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 relief 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 a part of the first wall 21a, for example, the pressure relief mechanism 213 may be formed by making a recess on the first wall 21a, and the thickness of the first wall 21a that corresponds to the recess is less than the thickness in other portions of the pressure relief mechanism 213 except notches. The notch represents the weakest point of the pressure relief mechanism 213. When excess gas generated by the battery cell 20 causes the internal pressure of the housing 211 to rise and reach a threshold value, or the internal temperature of the battery cell 20 rises and reaches 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 recess, resulting in communication between the spaces inside and outside the housing 211. The pressure and temperature of the gas are reduced by venting out 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 terminals 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 located between the electrode assembly 22 and the bottom wall of the housing 211, can support the electrode assembly 22, and can also effectively prevent the electrode assembly 22 from colliding with the rounded corners around the bottom wall of the housing 211. In addition, the support plate 24 may be provided with one or more through holes, for example, the support 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 positions corresponding to the mechanism 213 pressure relief, to facilitate the direction of liquid and gas. In particular, they can communicate the spaces of the upper surface and the lower surface of the support plate 24, and the gas generated inside the battery cell 20 and the electrolyte solution can freely pass through the support plate 24.

The pressure relief mechanism 213 and the electrode terminals 214 are provided on different walls of the battery cell 20, so that when the pressure relief mechanism 213 is activated, the emissions from the battery cell 20 can be further removed from the electrode terminals 214, thereby reducing the impact of the emissions on the electrode terminals 214 and bus-shaped component and therefore increasing battery safety.

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 operated, emissions from the battery cell 20 can be released 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 since the bottom of the battery 10 is generally far from the 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 relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold value; and/or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to crack when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold value.

In fig. 6 is a schematic diagram of 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. A pressure relief mechanism 213 is provided on the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is operable to reduce the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value. For example, battery cell 20 may be battery cell 20 in FIG. 5.

The thermal control component 13 is configured to receive a fluid for adjusting the temperatures of the plurality of battery cells 20. In the event of a decrease in the temperatures of the battery cells 20, the thermal control component 13 may receive a cooling medium for adjusting the temperatures of the plurality of battery cells 20. In this case, the thermal control component 13 may also be referred to as a cooling component , a cooling system or a 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.

A first surface (top surface shown in FIG. 6) of the temperature control component 13 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 configured to be damaged by emissions discharged from the battery cell 20 when the pressure relief mechanism 213 is activated, causing the emissions to pass through the temperature control component. 13.

In an embodiment of the invention, the first surface of the temperature control component 13 is attached to the first wall 21a provided with a pressure relief mechanism 213 such that, when the pressure relief mechanism 213 is activated, emissions from the battery cell 20 are released towards the temperature control component 13. In addition, the temperature control component 13 is configured with the possibility of being damaged by emissions released from the battery cell 20 when the pressure relief mechanism 213 is activated, causing the emissions to pass through the temperature control component 13. Thus, the emissions can pass through the temperature control component 13 and quickly release away from the battery cell 20 with a decrease thereby risking emissions and increasing battery safety.

Optionally, as shown in FIG. 7, in an embodiment of the invention, to facilitate the passage of emissions through the temperature control component 13, the temperature control component 13 is provided with a weakened zone 135. The weakened zone 135 is configured to be damaged by emissions when the pressure relief mechanism 213 is activated, causing the emissions to pass through the weakened zone 135.

Optionally, the weakened area 135 may be located opposite the pressure relief mechanism 213. Thus, when the pressure release mechanism 213 is activated, the emissions may directly impact the weakened zone 135 to open the weakened zone 135.

The weakened zone 135 may have various designs that facilitate blast damage, which are not limited to embodiments of the invention and will be illustrated below by way of example.

Optionally, as shown in FIG. 8, in the embodiment of the invention, the temperature control component 13 is provided with a recess 134 located opposite the pressure relief mechanism 213, and the bottom wall of the recess 134 forms a weakened area 135. Since the bottom wall of the recess 134 is weaker than other areas of the temperature control component 13, the bottom wall is easily damaged. emissions. When the pressure relief mechanism 213 is activated, the emissions may damage the bottom wall of the recess 134 and pass through the temperature control component 13.

Optionally, a recess 134 is provided on the surface of the temperature control 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 the emissions.

The temperature control component 13 may define a fluid flow path of thermally conductive material. Fluid flows in the flow channel and conducts heat through the thermally conductive material to regulate the temperature of battery cell 20. Optionally, the weakened area may have only thermally conductive material but 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. 9a-9c, in an embodiment of the invention, the thermal control component 13 may include a first thermal conduction plate 131 and a second thermal conductive plate 132. The first thermal conductive plate 131 and the second thermal conductive plate 132 define a flow path 133 for accommodating fluid. The first heat conduction plate 131 is located between the first wall 21a and the second heat conduction plate 132 and is attached to the first wall 21a. The first portion 131a of the first thermal conductive plate 131 is recessed toward the second thermal conductive plate 132 to form the recess 134, and the first portion 131a is connected to the second thermal conductive plate 132. Thus, the flow path 133 is formed around the recess 134, while the bottom wall of the recess 134 is not a flow channel is formed, thereby forming a weakened zone.

Optionally, the first thermal conductive plate 131 or the second thermal conductive 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. 9c, in the embodiment of the invention, the first portion 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. That is, the first thermal conductive plate 131 on the bottom wall of the recess 134 is removed, and the connection between the first thermal conductive plate the plate 131 and the second thermal conductive plate 132 remain on the lower edge of the recess 134 to form a flow channel 133 around the recess 134.

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

In fig. 10a-10c show schematic diagrams of the temperature control component 13. As shown in FIG. 10a to 10c, the first heat conduction plate 131 is recessed to form a recess 134, and a portion of the second heat conduction plate 132 corresponding to the recess 134 has no flow path and is provided with a weakened recess 132a. Thus, after the first heat conduction plate 131 and the second heat conduction plate 132 are connected to each other, a weakened area 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 thickness reduction methods. For example, a blind hole or a stepped hole may be formed in the first portion 131a of the first heat conduction plate 131; and/or a blind hole is formed in the second heat conduction plate.

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 area 135 may have a thickness of 1 mm or less.

In addition to the weakened zone 135 having a smaller thickness, the weakened zone 135 made of a low melting point material can also be used to promote its melting by emissions. That is, the weakened zone 135 may have a lower melting point than the rest of the temperature control component 13. For example, the material of the weakened zone 135 has a melting temperature below 400°C.

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

Optionally, in an embodiment of the invention, the temperature control component 13 is configured to be damaged when the pressure release mechanism 213 is activated, causing fluid to be released from the interior of the temperature control component 13.

Specifically, when the pressure relief mechanism 213 is activated, the temperature control component 13 is damaged and fluid is released from the interior of the temperature control component 13. This can absorb heat from the battery cell 20 and lower the emission temperature, thereby reducing the risk caused by the emission. Due to fluid cooling, the temperature of the emissions from the battery cell 20 can be quickly reduced and, as a result, the emissions also do not have a significant negative impact on other parts of the battery, such as other battery cells 20, whereby the destructive effect caused by the failure of one battery cell 20, can be suppressed extremely quickly, and the probability of battery explosion can be reduced.

Optionally, in an embodiment of the invention, a portion of the temperature control component 13 around the weakened zone 135 may be damaged by emissions, causing fluid to be released from the interior of the temperature control component 13.

Specifically, when the pressure relief mechanism 213 is activated, the discharge from the battery cell 20 first damages (by rupture or melting) the weakened zone 135 and then passes through the weakened zone 135 and is released. In addition, the emissions also damage parts around the weakened area 135. For example, the hot emissions melt the surrounding temperature control component 13, causing fluid to be released from the interior of the temperature control component 13, thereby cooling the hot emissions. Since 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.

Optionally, in an embodiment of the invention, when the temperature control component 13 is provided with a recess 134, the side surface of the recess 134 may be damaged by emissions, causing fluid to be released from the interior of the temperature control component 13.

In the case of using the recess 134, when the pressure relief mechanism 213 is activated, the emissions from the battery cell 20 will rush into the recess 134. Since the bottom wall of the recess 134 is relatively weak, the emissions will damage the bottom wall of the recess 134 and will pass through the temperature control component 13. In addition, the emissions will flowing into recess 134 also melts the side surface of recess 134, causing fluid to be released from the interior of temperature control component 13, thereby cooling the hot emissions.

Optionally, the radial size of the recess 134 gradually decreases in a 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 emissions and contribute to damage from emissions. 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) may range from 15° to 85°.

When actuated, the pressure relief mechanism 213 is deformed to communicate spaces inside and outside the battery cell 20. For example, with the pressure relief mechanism 213 using a recess, when actuated, the pressure relief mechanism 213 cracks at the recess and opens towards two sides. Accordingly, the pressure release mechanism 213 requires a certain deformation space. In an embodiment of the invention, the recess 134 is configured as a bypass chamber to allow the pressure relief mechanism 213 to open when the pressure relief mechanism 213 is activated. The bypass chamber provides a deformation space for the pressure relief mechanism 213, causing the pressure relief mechanism 213 to deform toward the temperature control component 13 and crack.

When used as a bypass chamber, the recess 134 must be positioned such that the pressure relief mechanism 213 can be opened when operated. In particular, the depth of the recess 134 depends on the size of the pressure relief mechanism 213. As an embodiment of the invention, the recess 134 has a depth of more 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 release mechanism 213. The opening area of the recess 134 also depends on the area of the pressure relief mechanism 213 . To enable the pressure relief mechanism 213 to open, 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, 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 should 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 may be in the range of 0.5 to 2.

When the pressure relief mechanism 213 is provided on the first wall 21a of the battery cell 20, at least a portion of the pressure relief mechanism 213 may protrude outward from the first wall 21a. This may facilitate the installation of the pressure release mechanism 213 and the formation of an interior space of the battery cell 20. Optionally, as shown in FIG. 11, in an embodiment of the invention, if at least a portion of the pressure relief mechanism 213 protrudes outward 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 firmly attached to the surface of the temperature control component 13, which is conducive to fixing the battery cell 20, and can also save space and improve the thermal control efficiency. Moreover, when the pressure relief mechanism 213 is activated, the emissions from the battery cell 20 can be released toward the bypass chamber and away from the battery cell 20, thereby reducing the risk caused by the emissions, 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 projects outwardly, and the bypass chamber is configured to receive the outwardly projecting portion of the first wall 21a around the pressure relief mechanism 213. Likewise, in the case where a portion of the first wall 21a around the pressure release mechanism 213 protrudes outward, the bypass chamber 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 fix the battery cell 20, and can also save space and improve the efficiency of thermal regulation.

It should be understood that, in addition to providing the temperature control component 13 with a design such that the temperature control component 13 can be damaged when the pressure relief mechanism 213 is operated, the pressure relief mechanism 213 can also be configured so that the temperature control component 13 can be damaged when activated. operation of the pressure release mechanism 213.

Optionally, in an embodiment of the invention, the pressure release mechanism 213 is equipped with a breaking device. The breaking device is configured to damage the temperature control component 13 when the pressure release mechanism 213 is activated, causing fluid to be released from the interior of the temperature control component 13. For example, the breaking device may be a spike, but this is not limited to the embodiment of the invention.

Optionally, in an embodiment of the invention as shown in FIG. 12, the battery 10 may also include 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. So-called “isolation” herein refers to a separation that may or may not be airtight.

The electrical chamber 11a is configured to receive a plurality of battery cells 20. The electrical chamber 11a may also be configured to receive a busbar component 12. The electrical chamber 11a defines a housing space for the battery cells 20 and the busbar component 12, and the shape of the electrical chamber 11a may correspond to a plurality of battery cells 20 and the busbar component 12. The busbar component 12 is configured to electrically connect a plurality of battery cells 20. The busbar component 12 is capable of electrically coupling between the battery cells 20 by connecting the electrode terminals 214 of the battery cells 20. The collection chamber 11b is configured to collect emissions when the mechanism is driven. 213 pressure release.

In an embodiment of the invention, the temperature control component 13 is used to isolate the electrical chamber 11a from the collection chamber 11b. In other words, the electrical chamber 11a for receiving the plurality of battery cells 20 and the busbar component 12 is separated from the collection chamber 11b for collecting emissions. That is, when the pressure relief mechanism 213 is operated, the emissions from the battery cell 20 enter the collection chamber 11b rather than the electrical chamber, or a small amount of 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 invention, the temperature control component 13 is configured to be damaged by emissions when the pressure relief mechanism 213 is activated, causing the emissions to pass through the temperature control component 13 and enter the collection chamber 11b.

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 may be either a wall of the electrical chamber 11a or a 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, 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, emissions can be isolated as much as possible from the electrical chamber 11a, thereby reducing the risk caused by emissions and increasing the safety of the battery .

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

Optionally, the shell 110 may consist of multiple parts. For example, as shown in FIG. 14, the shell 110 may include a first portion 111 and a second portion 112. Two sides of the second portion 112 have openings, respectively. The first part 111 covers an 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, thereby forming an electrical chamber 11a.

The embodiment of 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 a temperature control component 13, and the temperature control component 13 serves as a wall of the electrical chamber 11a, thereby forming the electrical chamber 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 having openings is formed, and the first part 111 and the temperature control component 13 cover the openings on 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 be comprised of a temperature control component 13 and a security element. For example, as shown in FIG. 15, the battery 10 further includes a protective element 115. The protective 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 member 115 and the temperature control component 13 does not occupy a space that can accommodate battery cells. Therefore, the collection chamber 11b can be configured with a large space inside, which can effectively collect and absorb emissions and reduce the risk caused by them.

Optionally, in an embodiment of the invention, a fluid such as a cooling medium or a fluid accommodating component may be further 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 security element 115 and the temperature control 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, whereby a portion of the emissions may be further discharged to the outside of 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 security member 115 form the collection chamber 11b. Optionally, the temperature control component 13 may 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 within the shell 110 and divides the interior of the shell 110 into an electrical chamber 11a and a collection chamber 11b. That is, the closed shell 110 inside forms a chamber, and the temperature control component 13 divides the chamber inside the shell 110 into two chambers, namely, an electrical chamber 11a and a collection chamber 11b.

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

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

Optionally, in the embodiment of the invention, the electrical chamber 11a is isolated from the collection chamber 11b by the 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, whereby 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 invention. In the embodiment of the invention shown in FIG. 18, the temperature control component 13 is provided with a recess 134 and forms a collection chamber together with the protective element 115.

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

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

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

In fig. 19 is a flow diagram of a method 300 for manufacturing a battery according to one embodiment of the 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 provided on the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is operable to reduce 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, wherein the temperature control component 13 is configured to receive a fluid; And

step 330: attaching the first surface of the thermal control component 13 to the first wall 21a of the battery cell 20, wherein the thermal control component 13 may be damaged by emissions discharged from the battery cell 20 when the pressure relief mechanism 213 is activated, causing the emissions to pass through the temperature control component 13 .

In fig. 20 is a block diagram of a battery manufacturing apparatus 400 according to an embodiment of the invention. As shown in FIG. 21, 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 provided on the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is operable to reduce 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 configured to receive a fluid.

The installation module 420 is configured to attach a first surface of the temperature control component 13 to the first wall 21a of the battery cell 20, wherein the temperature control component 13 may be damaged by emissions discharged from the battery cell 20 when the pressure relief mechanism 213 is activated, causing the emissions to pass through thermoregulatory 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 is illustrated in detail with reference to the above embodiments, it will be understood by those skilled in the art that they may still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features described herein. but these changes or substitutions 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 (50)

1. Battery (10) containing: a battery cell (20) comprising a pressure relief mechanism (213), wherein the pressure relief mechanism (213) is disposed on a first wall (21a) of the battery cell (20), and the pressure relief mechanism (213) is operable to reduce internal pressure or temperature when the internal pressure or temperature of the battery cell (20) reaches a threshold value; And a temperature control component (13) configured to receive a fluid to regulate the temperature of the battery cell (20); wherein the first surface of the temperature control component (13) is attached to the first wall (21a) of the battery cell (20), wherein the temperature control component (13) is configured to be damaged by emissions released from the battery cell (20) when the mechanism (213) is activated ) pressure release, causing emissions to pass through the thermostatic component (13). 2. The battery according to claim 1, wherein the temperature control component (13) is provided with a weakened zone (135), and wherein the weakened zone (135) is configured to be damaged by emissions when the pressure relief mechanism (213) is activated, whereby the emissions pass through through the weakened zone (135). 3. The battery according to claim 2, in which the weakened zone (135) is located opposite the pressure relief mechanism (213). 4. The battery according to claim 2, in which the temperature control component (13) is provided with a recess (134) located opposite the pressure relief mechanism (213), and the lower wall of the recess (134) forms a weakened zone (135). 5. The battery according to claim 4, in which the recess (134) is placed on the surface of the temperature control component (13) facing the first wall (21a). 6. The battery according to claim 5, wherein the temperature control component (13) includes a first thermal conduction plate (131) and a second thermal conductive plate (132), wherein the first thermal conductive plate (131) is located between the first wall (21a) and the second thermal conductive plate ( 132) and attached to the first wall (21a), the first portion (131a) of the first thermal conductive plate (131) is recessed toward the second thermal conductive plate (132) to form a recess (134), and the first portion (131a) is connected to the second thermal conductive plate ( 132). 7. The battery according to claim 6, wherein the first portion (131a) is provided with a through hole (136), and the radial size of the through hole (136) is smaller than the radial size of the recess (134). 8. The battery according to claim 7, wherein the thickness of the second thermal conductive plate (132) which corresponds to the through hole (136) is less than the thickness of the second thermal conductive plate (132) in other areas. 9. The battery according to claim 2, wherein the weakened area (135) has a thickness that is less than or equal to 3 mm. 10. The battery of claim 2, wherein the weakened zone (135) has a lower melting point than the rest of the temperature control component (13). 11. The battery according to claim 10, wherein the material of the weakened zone (135) has a melting point below 400°C. 12. The battery of claim 2, wherein a portion of the temperature control component (13) around the weakened area (135) is capable of being damaged by emissions such that fluid is released from the interior of the temperature control component (13). 13. The battery of claim 4, wherein the side surface of the recess (134) is configured to be damaged by emissions such that fluid is released from the interior of the temperature control component (13). 14. The battery according to claim 13, wherein the radial size of the recess (134) is gradually reduced in a direction away from the pressure relief mechanism (213). 15. The battery according to claim 4, in which the recess (134) is configured as a bypass chamber to allow the pressure relief mechanism (213) to open when the pressure relief mechanism (213) is activated. 16. The battery according to claim 15, wherein the depth of the recess (134) depends on the size of the pressure relief mechanism (213). 17. The battery according to claim 15, in which the recess (134) has a depth of more than 1 mm. 18. The battery according to claim 15, in which the opening area of the recess (134) depends on the area of the pressure relief mechanism (213). 19. The battery according to claim 18, in which 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. 20. The battery of claim 15, wherein at least a portion of the pressure relief mechanism (213) projects outward from the first wall (21a), and wherein the bypass chamber is configured to accommodate at least a portion of the pressure relief mechanism (213). 21. The battery of claim 15, wherein a portion of the first wall (21a) around the pressure relief mechanism (213) projects outwardly, and wherein the bypass chamber is configured to accommodate the outwardly projecting portion of the first wall (21a) around the pressure relief mechanism (213). . 22. The battery according to claim 1, wherein the second wall of the battery cell (20) is provided with electrode terminals, and wherein the second wall is different from the first wall (21a). 23. The battery according to claim 22, in which the second wall is located opposite the first wall (21a). 24. The battery of claim 1, wherein the pressure relief mechanism (213) is a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell (20) reaches a threshold value; and/or The pressure relief mechanism (213) is a pressure-sensitive pressure relief mechanism configured to crack when the internal pressure of the battery cell (20) reaches a threshold value. 25. Battery according to any one of paragraphs. 1-24, which additionally contains: an electrical chamber (11a) configured to accommodate a plurality of battery cells (20); And a collection chamber (11b) configured to collect emissions when the pressure relief mechanism (213) is activated; wherein the temperature control component (13) is configured to isolate the electrical chamber (11a) from the collection chamber (11b). 26. The battery according to claim 25, wherein the temperature control component (13) has a wall that is common to the electrical chamber (11a) and the collection chamber (11b). 27. The battery according to claim 25, which further comprises a protective element (115) that is configured to protect the thermal control component (13), and wherein the protective element (115) and the thermal control component (13) form a collection chamber (11b). 28. The battery according to claim 25, wherein the electrical chamber (11a) is isolated from the collection chamber (11b) by a temperature control component (13). 29. The battery of claim 25, wherein the temperature control component (13) is configured to be damaged by emissions when the pressure relief mechanism (213) is activated, causing the emissions to pass through the temperature control component (13) and enter the collection chamber (11b). 30. A vehicle containing a battery (10) according to any one of claims. 1-29. 31. A method (300) for manufacturing a battery, including: providing (310) the presence of a battery cell (20), wherein the battery cell (20) contains a pressure relief mechanism (213), and the pressure relief mechanism (213) is located on the first wall (21a) of the battery cell (20), and the mechanism (213 ) pressure release is configured to be actuated to reduce internal pressure or temperature when the internal pressure or temperature of the battery cell (20) reaches a threshold value; providing (320) the presence of a thermoregulating component (13), wherein the thermoregulating component (13) is configured to accommodate a fluid; And attaching (330) a first surface of a temperature control component (13) to a first wall (21a) of a battery cell (20), wherein the temperature control component (13) is capable of being damaged by emissions discharged from the battery cell (20) upon activation of the mechanism ( 213) release of pressure, as a result of which the emissions pass through the thermostatic component (13). 32. The method of claim 31, wherein the temperature control component (13) is provided with a weakened zone (135), and wherein the weakened zone (135) is configured to be damaged by emissions when the pressure relief mechanism (213) is activated, whereby the emissions pass through through the weakened zone (135). 33. The method according to claim 32, wherein the temperature control component (13) is provided with a recess (134) located opposite the pressure relief mechanism (213), and the lower wall of the recess (134) forms a weakened zone (135). 34. The method of claim 33, wherein the thermal control component (13) comprises a first thermal conduction plate (131) and a second thermal conductive plate (132), wherein the first thermal conductive plate (131) is located between the first wall (21a) and the second thermal conductive plate ( 132) and attached to the first wall (21a), the first portion (131a) of the first thermal conductive plate (131) is recessed toward the second thermal conductive plate (132) to form a recess (134), and the first portion (131a) is connected to the second thermal conductive plate ( 132). 35. The method according to claim 34, wherein the first portion (131a) is provided with a through hole (136), and the radial size of the through hole (136) is smaller than the radial size of the recess (134). 36. Device (400) for making a battery, containing: support module (410), configured to: ensuring the presence of a battery cell (20), wherein the battery cell (20) contains a pressure relief mechanism (213), the pressure relief mechanism (213) being located on the first wall (21a) of the battery cell (20), and a pressure relief mechanism (213) configured to be actuated to reduce internal pressure or temperature when the internal pressure or temperature of the battery cell (20) reaches a threshold value; And ensuring the presence of a thermoregulating component (13), wherein the thermoregulating component (13) is configured to accommodate a fluid; And a mounting module (420) configured to attach (330) a first surface of a temperature control component (13) to a first wall (21a) of a battery cell (20), wherein the temperature control component (13) is capable of being damaged by emissions released from the battery cell ( 20), when the pressure relief mechanism (213) is activated, causing the emissions to pass through the thermostatic component (13).