High voltage rechargeable battery module

Abstract

A high-voltage battery module (1) for electrical energy transport and storage, comprising an electronic key and protection package (2), a battery (3) of cells (3.1) having flat washer electrodes with longitudinal channels (3.8) and a single built-in varistor (3.4) with galvanic decoupling thereto connected through one of these channels between terminals (3.2) and (3.3) at both its poles with conductors (3.6) and (3.7). For galvanic decoupling, in series with the varistor (3.4), their gas discharger (3.10) with the same allowable pulse discharge current. The varistor (3.4), together with the capacitive-resistive voltage divider composed of all cells and a longitudinal electrostatic screen-normalizer (5) arranged longitudinally around the housing (3.5), forms a complex built-in virtual-hardware protection for all elements from impulse surges on the battery (3). The channels (3.8), implemented as tubes (4) of dielectric film with hydrophobically treated longitudinal ends (4.1), form group valves for venting gases possibly emitted during operation.

Description

[0001] HIGH VOLTAGE RECHARGEABLE BATTERY MODULE

[0002] FIELD OF TECHNOLOGY

[0003] The invention concerns a high voltage battery module and it will find application in electric vehicles, electric forklifts, submarines and other transport and service equipment.

[0004] PRIOR ART

[0005] Electrical power is known to be a physical quantity characterizing the rate at which electrical energy is transmitted or converted in the electrical circuit, and the capacity of rechargeable batteries is calculated in energy units - kilowatt-hours or ampere-hours.

[0006] Therefore, the power of the electrochemical battery sources is added, increasing both their load current and the operating voltage. The increase in current is done by connecting the elements in parallel, and the increase in voltage - by connecting the elements in series with nominally identical load current and operating voltage. While low-power consumers mainly use connection in series, with high-power consumers, often are connected using mixed connection of cells into modules, and each module is composed of elements which are generally designed to be identical. Increasing the power of the battery is achieved with a higher energy density of the element and higher capacity of the single element, and also by lowering of its internal resistance. For example, the unit capacity of modem home appliance batteries exceeds 3000 - 8000 mAh and 9 - 24 Wh at voltage of between 2 and 4 V, i.e. a possible short circuit in each powerful element with the increase of its capacity and load current, in principle, leads to increasingly more destructive and more dramatic consequences for the entire vehicle, including fire and death of people, and also explosion of generated gases, etc. In traction batteries, the capacity of the individual element becomes even higher, and the size - considerable. The price of such batteries is high. There is no consensus on standardization. It is complicated to process these batteries for extraction of secondary raw materials, recycling, etc., and this restricts the spread of electric vehicles. The ever- increasing energy density of batteries only exacerbates the problems mentioned. The load current of batteries is mainly limited by their internal resistance which, is a sum of resistance of electrolyte and of the electrodes which because of their significant length and low cross section is not negligibly low and reaches units-to-tens milliohms per cell. While the resistance of electrolyte has negative thermal coefficient, that of the electrodes is positive so when heated, the efficiency of battery further deteriorates and decreases.

[0007] In document US2018026316 Al [1] a method and a device for charging a rechargeable battery are disclosed. The rechargeable battery contains: multiple rechargeable batteries connected in parallel, diodes, switches, terminals, a hysteresis package, a rechargeable device, a voltage detector and a resistor.

[0008] In document EP3267510 Al [2] a traction rechargeable battery is disclosed, which has several interconnected accumulator cells, each having positive and negative electrode plates, electrolyte, a battery box, a battery trough, an accumulator box, a side wall, a floor gap between the accumulator cells and a spacer.

[0009] In document US2010052603 Al [3], a rechargeable battery is disclosed, which has a battery housing, an accumulator cell in the housing, a charging circuit, one or more solar cells, diodes, outlets and FRID.

[0010] In document CA2381035 Al [4], a hybrid rechargeable battery is disclosed, which consists of batteries connected in parallel one to another, a diode, an inverter and a power source.

[0011] Publication [5] discloses how electric car batteries works. There is not just “a rechargeable battery" in the car. The "energy tank" consists of many separate modules that are made up of many cells. The battery cell is the smallest unit in the battery system. Modem systems consist of the so-called Pouch cells, which resemble cells in mobile phone batteries. In ID.3, a total of 24 cells of this kind make up one battery module. Up to 12 modules make up one of the "accumulator packs" in the electric VW. However, there may be more or fewer modules and they determine the capacity of the battery.

[0012] By adding modules, the mileage increases, and by reducing their number, it decreases. The basic structure remains always the same: The cell modules are located in the battery housing, which protects the individual modules from damage. All important components are located in a solid main frame that acts as a crash-frame. With Volkswagen's MEP (modular electrification platform) the battery cooling system is located on the floor. All components are connected by high-voltage cables. The system is unnecessary complicated.

[0013] The task of the invention is to provide a construction for high voltage rechargeable module for EV, power banks, submarines, drones etc. for example, rated for 220, 400, 800 up to over than 6000 [V] which, should be designed to be tough, heavy-duty, easily withstanding high charge / discharge / pulse current, to be easily thermal controlled (cooled / pre -heated if necessary) from outside surface and from its core as well. The module should has, minimum internal resistance and, remain sustainable to skin-effect during work, forming minimum thermal loses when working. The module should has lowest weight and as uniform and as low current density along the electrodes as possible. Also there should be limitation of a short-circuit energy and a reliable integrated overvoltage protection by varistors for each single cell in order to avoid damage by electromagnetic pulse nearby. It should be vibration sustainable, easy for replacement and, to allow the joint parallel operation of modules from different electrochemical system within one battery / power bank. The module should be sustainable for warming by skin-effect caused by high frequency commutation of invertors for overload which, shouldn’t lead to disconnection and accidents. Next, even in case of a cell shortage, the module should maintain high enough residual working capacity so, the customer not to lose significant power and mileage.

[0014] Varistors are in use for long time.

[0015] The prior art has no answers to all these challenges mentioned above.

[0016] Document BG / P / 2021 / 113320 [8] (retained) discloses battery 1 consisting of working in parallel only micromodules with limited capacity, connected to a charging busbar 3.1 and to discharging one, 3.2 thru individual electronic key pack 2.5 and, to the common busbar 3.3 thru pole shoe 2.1. The battery remains potentially vulnerable to electrical overstress and, inside the housing, there is simply no free space for additional varistors.

[0017] Document JPH1140204A [9] of HITACHI , from 1999-02-12 (patent not granted) discloses an element with a n individual varistor protection of a cell with a bi-metallic disconnector but, it’s too complicated and needs to be placed inside the cell. Moreover, if overloaded it disconnects the cell which leads to disconnection of whole module so the option is dropped.

[0018] Document EP0129035A1

[0010] from 1984-12-27 (patents granted) there is description of a varistor protection with fusible parts and mechanical parts but, it’s too complicated and the components are placed out of the cell so, it doesn’t fit.

[0019] Document US2005190519A1

[0011] from 2005-09-01 (patents granted) discloses varistor protection for a cell, placed out of it, containing fusible elements etc. and having 3 leads. For an affordable module, doesn’t fit.

[0020] In a document RU193411U1

[0012] published on 2019-10-29 (utility model granted) we see a protection device for a battery using varistor, connected to a positive pole in a parallel with an inductor, a backward polarized diode in parallel with capacitor between the anode and cathode of the battery. The circuitry is unable to prevent electrical breakdown inside the cells themselves, of the battery from surges induced directly along their electrodes from lightning and switching events in close proximity, which could be dangerous in battery systems storing large amounts of energy. Does not meet all requirements.

[0021] Document US2011228431A1

[0013] published on 2011-09-22 (patents granted) describes an electrostatic protection of a printed circuit board inside a metallic box, earthings etc. which, does not communicate to the task of invention.

[0022] If, according to it, inside every single cell we install their own varistors and fusible disconnectors, springs and contacts that would complicate and make more expensive the whole module meanwhile, making it even more unreliable because of corrosion by electrolyte etc. Maintaining such object in good working condition becomes mission impossible, and the recycling at the end of lifecycle as well. In addition to that, varistors, connected to the cell terminals don’t allow to avoid on 100% the inducted to a distributed inductance of rolled electrodes overvoltage peaks which, makes such protection not good enough. Separately, the high frequency oscillatory processes caused by loading and charging equipment with sharp fronts of current rise and fail additionally, overheat the cells because of skin effect and low cross section of electrodes. All of that in summary, complicates protection and leads to system issues. Using inside the modules cells with individual metal housings makes them heavier and hard to recycle.

[0023] The performance of the cells in modules with individual metal housings, is an issue facing battery recycling and lightweighting.

[0024] Obviously, the well-known state-of-the-art solutions are not complex and perfect enough. The present application, offers a way out of the difficulty.

[0025] SUMMARY OF THE INVENTION

[0026] The task is solved by composing the module 1 in a common electronic switching and protection array 2 and a high voltage battery 3 as a string of cells 3.1 where, the individual protection of cells is virtual and its formed by using of active-capacitive, with practically zero inductance of internal impedance cells 3.1, the properties of voltage divider, formed by their identical impedances and a varistor 3.4 factory built-in or replaceable connected to the both poles of battery 3.

[0027] The cells 3.1 are stacked one on top of the other and packaged in a common housing 3.5 of heat- shrinkable material at one end of which is embedded a varistor 3.4 with a breakdown voltage of approximately, between 1.5 to a maximum of 2 times the amplitude value of the charging voltage, connected between the terminals 3.2 on the positive and 3.3 on the negative pole.

[0028] Additionally, galvanically non-connected to the battery 3 electrostatic shield-normalizer 5, neutralizes the edge-effect on electrodes and normalizes electrical tension normally to the surface of housing 3.5 for lowering the probability of an electrical breakthrough of insulation. The varistor 3.4 might be made with or without galvanic disconnection from poles of battery 3. In order to disconnect the varistor galvanically, in series to it, a gas discharger 3.9 with rated pulse current equal to that of the varistor 3.4 and breaking voltage near to 1,2 times the amplitude of charging voltage so that, a break trough discharger to precedes breakthrough in the varistor.

[0029] The high pulse current of the battery 3 is result of its low internal resistance because of no interelectrode wires and microscopic length of electrodes equal to their thickness plus practically zero inductance which reduces overvoltages from near leghtnings and other electromagnetic pulses.

[0030] Battery 3 consists of stacked and connected in series identical cells 3.1 with flat, disk-like electrodes which have limited (instead of - as the common practice at present, as high as possible) capacity of a single cell) e.g. 0,1 to 0,5 [Ah] at a standardized rated voltage on its terminals for example 40, 400, 800 or 1000[V].

[0031] Inside the body 2.7 of the electronic switching and protective array 2 there is 3 varistors 2.8 installed between pole shoes 2.3, 2.3 and the terminal 2.4 as well.

[0032] The varistor 3.4, regardless of that whether it is or it isn’t galvanically disconnected thru gas discharger 3.9, is connected to the battery 3 between its terminal 3.2 and the other terminal 3.3 via metallic conductor 3.7 , passing thru a longitudinal canal 3.8.

[0033] The individual (for the module) commutation block 2.1 inside the body of electronic switching and protective array 2, controls the charge and discharge processes, disconnection after charge and, together with the varistor 3.4, protects the battery 3 against damages caused by electromagnetic and electrostatic interferences.

[0034] Along the battery 3 are made 1 or more canals 3.8 with diameter for example 5 mm for passing of a fluid for thermal control and special group valves for gas release and protection from inflation of cells 3.1 during work.

[0035] Outside and coaxial along the common housing 3.5, at a radial distance of 1 to 4 mm, an electrostatic shield-normalizer made of a conductive foil rolled into a tube with an open loop or as a thin-walled metal tube cut longwise is fixed.

[0036] DESCRIPTION OF THE ENCLOSED FIGURES

[0037] Fig.l - Presents a variant of a functional electric diagram of the module;

[0038] Qnr.2 - Shows in cross-section a structural embodiment of a high-voltage battery module, symbolically, a passage channel 3.8 for thermoregulating fluid is indicated;

[0039] Fig.3 - Presents, without claim to completeness, a general electric diagram of a several general variants of the commutation block 2.1.

[0040] Fig.4 - Presents variants of implementation of module 1 with separated and combined charge-and discharge busbars.

[0041] Fig.5 - Shows a variant of a power varistor 3.4 with metalized surfaces;

[0042] Fig.6 - Shows an integrated as a common design varistor 3.4 and gas discharger 3.9 for galvanic disconnection;

[0043] Fig.7 - An embodiment of the battery gas valve 3 is shown, where 4 is the foil, 4.1 is the hydrophobically treated ends 4.1 and 3.8 is the longitudinal fluid flow channel.

[0044] Fig.8 - Illustrates the prior art - a problem which, wasn’t solved yet. Here we see the equivalent internal diagram of a coiled-electrodes single battery cell used today at the moment of a close electromagnetic pulse / event 7-1 nearby (such like lightning, commutation pick etc). Here we see the internal inductance which / when crossed by high d<b / dt magnetic lines 7-2 / generates sharp overvoltage peaks which, could cause electrical breakthrough and fire. ;

[0045] Fig.9 - Shows an individual protection of multiple cells with their own varistors. Here we see how many varistors are needed, and that, they should be located somewhere, etc.

[0046] Fig.10 - Shows the principle of action of a hardware - virtual overvoltage protection based on a voltage divider formed by non-inductive flat battery’s cell string combined with varistor and gas discharger;

[0047] EXAMPLES OF EMBODIMENTS OF THE INVENTION

[0048] Electric vehicles module, with capacity: 80 [Wh], voltage: 800 [V], amplitude of charging voltage 1000[V].

[0049] The module 1 consists of an electronic protection and commutation block 2.1 and a battery 3 made of 220 cells 3.1 stacked and packaged in a common housing 3.5 where the commutation block 2.1 is individual, integrated inside the body 2.7 of electronic -switching and protection array 2 of the module 1 and is connected to separate busbars for charge and discharge thru pole shoes 2.2 and 2.3 and, to the common busbar thru a pole shoe 2.9. Varistors 2.8 with a working voltage near 1 / 2 of breaking voltage (e.g.30[V]) of diodes of commutation block 2.1 lie between pole shoes 2.2, 2.3 and terminal 2.4.

[0050] The battery 3 is connected to terminal 2.4 of block 2.1 thru its terminal 3.2 and then, to the pole shoe 2.9 - thru its own terminal 3.3, terminal 2.6 and thru protection impedance 2.5, for example, an inductor of 1.0 [pH].

[0051] Along every single module 1, by overlapping (for example of 4 mm) of wall of the central longitudinal canal made of plastic (e.g.of PTFE) and rolled into a tube after treating by hydrophobic composition is formed a group valve for gas pressure release.

[0052] The central longitudinal canal 3.8 has internal diameter of 5 mm. Cells are disk- like, housing-less and, stacked and packed in a common housing 3.5 made of heat shrinkable plastic. - The inner walls of the housings 3.5 of batteries 3 are coated against electrolyte penetration between the cells 3.1 with a gel-like or hydrophobic coating.

[0053] The varistor 3.4, with breaking voltave of 1500 [V] combined with a gas discharger 3.9 for 1200 [V] is done as a thick-walled plastic cylinder which, is airtight gap filled by pressusized gas (e.g. nitrogen) and metal vapour e.g. quicksilver where the varistor 3.4 is made as a thick tablet made of compressed ZnO with a hole at the center for canal 3.8 both bottoms of it are metalized. One of these metalized bottoms is connected to the conductor 3.6 out of the cylinder 3.10 and, between the second metalized bottom and conductor 3.7 leading outside the cylinder 3.10 there is a gap of roughly 0,3 mm.

[0054] The commutation block 2.1 contains discharging Shottky diode which anode is connected to the positive terminal 2.4, rated backward voltage of 60 [V] and rated anode current of 10 [A].

[0055] The charging diode is also Shottky, for backward voltage of 30 [V] and rated anode current of 5 [A] and, its anode is connected to pole shoe 2.3 and cathode - to positive terminal 2.4.

[0056] The anode of a fault indicator light emiting diode (LED) is connected using current limiting resistor of 220 [Q] 0,125 [W] to pole shoe 2.3 and its cathode is on the positive terminal 2.4 and zener - diode.

[0057] The zener diode is rated for 3.6 [V]. Its anode is connected to terminal 2.4 and, its cathode - to current-limiting resistor.

[0058] The protective impedance 2.5 is a coil with an inductance, e.g. 1 pH from a wire with a cross section of approximately 1 sq.mm.

[0059] The relay’s coil is rated for 5 [V] and its contacts are rated for 5[A] / 1000V

[0060] The invention is used wherein the high voltage module 1 is constituted to work in only in parallel with modules with the same operation voltage and connection dimensions in the composite batteries with a possible expandable capacity. During charging and discharge on load, thru canals 3.8 of modules a coolant fluid is pumped for thermal control purposes. When a single module 1 fails because of a cell shortage, the battery remains operational losing an almost imperceptible percentage of its capacity and power. When - because of discharge during work - the voltage of the other properly working modules lowers below it, that creates ability for automatic connection by the discharge diode inside of its commutation block 2.1 and so the faulty module continues to deliver power to the load.

[0061] The limited capacity of cells 3.1 combined with cooling of their core lowers the risk of ignition, meanwhile the ability to replace of a single module instead of whole battery facilitates maintenance and lowers operating costs in which, at the same time allows making of batteries with different individual design and compaction of all possible internal volumes of transport vehicles and production of a wide range of exploitation capacities based on a reduced number of standardized elements.

[0062] The advantages of such a high voltage rechargeable battery module consist mainly in the following:

[0063] - The implemented varistors 2.8 and 3.4 protects the battery 3 of internal electrical breakthrough caused by overvoltages led by power cables or inducted directly by an EMP or lightnings nearby.

[0064] - The risk of equalizing currents circulating inside the battery in case of possible failure of individual cells is decreased, whereby the remaining operational cells 3.1 are protected from overcharge and premature failure, moreover, the maximum possible capacity is preserved.

[0065] - The compact dimensions allow the modules 1 to be inserted and removed through the torpedo tubes / cargo hatches of submarines, instead of having to cut open the hull of the submarine for each replacement of even battery cells due to their huge individual housings.

[0066] - Interconnection of the modules 1 is only in parallel which, increases the load current of battery.

[0067] - Implementation of the modules 1 with an operating voltage equal to that of the whole battery 1.

[0068] - The housing-less cells 3.1 and their compacting in a common housing 3.5 saves a lot of metal for their individual housings thus saves weight of batteries and facilitates the secondary extraction of electrode materials after their commissioning.

[0069] - All modules 1 of a complete battery are mounted in its common box so thru them is provided to pump mineral / silicone oil or gas in order to facilitate thermal control at charge and at discharge as well.

[0070] - All the cells 3.1 are made disk-like with a central hole e.g. of 5 to 8 mm and have limited thickness of parts of a millimeter and that compacts the dimensions.

[0071] - The lowered density of load current of each module 1 lowers thermal stress of their contacts and load control if necessary.

[0072] - It is logistically friendly, at charging stations and EV-services to store spare modules 1 of a short list of just 1-to 2 types instead of whole batteries of as much types as much EV are sold.

[0073] Fire safety is ensured in several aspects:

[0074] - The limited individual capacity of each cell 3.1 significantly reduces the power during short circuit in one element and the total amount of energy released in that point.

[0075] - The high ratio of cooling surface to internal volume allows for rapid heat removal from the faulty cell 3.1.

[0076] - A short circuit between the terminals of several cells 3.1, is extremely unlikely both due to the absence of such terminals and due to the fact that it takes place even when a bulky external metal object is seriously cut into, first and foremost an individual short circuit in each cell, shunting a possible inclusion consecutively in the chain of more than one element.

[0077] - The discharging diodes prevent the flow of current from the remaining part of the battery through a faulty module 1, in whose cell 3.1 possibly, has been shorted.

[0078] Bibliography:

[0079] [1] US2018026316 Al

[0080] [2] EP3267510 Al

[0081] [3] US2010052603 Al

[0082] [4] CA2381035 Al

[0083] [5] https: / / autobild.bg - How do electric vehicle batteries work?

[0084] [6] https: / / wwp\edfcne£gy,cpnV£iectricycars / baitenes - All about electric car batteries

[0085] [7] https: / / www.cannagazine.co.uk / electnc / ev-car-battery-capacity-tecb / - Electric car batteries: everything you need to know

[0086] [8] BG / P / 2021 / 113320 - Taro Ba aKyMyjiaTopna oarepmi

[0087] [9] JPH1140204A - Secondary battery, HITACHI LTD , 1999

[0088]

[0010] EP0129035A1- Varistor fuse element. 1984-12-27

[0089]

[0011] US2005190519A1- Vehicle electrical protection device and system employing same

[0090]

[0012] RU193411U1 - VcTpoiicTBO 3anjnTbi aKKyMyjiaTopHoii oaraperi

[0091]

[0013] US2011228431A1 - Battery cell and electronic apparatus with electrostatic discharge protection

Claims

CLAIMS1. High voltage rechargeable battery module (1) containing electronic key and protection array (2) and a high voltage rechargeable battery (3) of multiple cells (3.1) which are put together in a common housing (3.5) and, characterized by the fact that, the battery (3) is placed inside of the body of the array (2), cells (3.1) are housing-less, for example, having bipolar electrodes or, pressed one against another, anode-to-kathode and packed in a heat shrink tube or insulation hose housing (3.5) where, the battery (3) is connected at its upper end with its terminal (3.2) to the terminal (2.4) of array (2) and, thru its lower terminal (3.3) to a the terminal (2.6) of an array (2), while the electrostatic shield-normalizer (5) is placed co-axial along the battery (3) outside and at a distance of 1 to 3 mm and, the protection varistor (3.4) is made galvanically separated thru a gas discharger (3.9).

2. High voltage rechargeable battery module (1) according claim 1 characterized by the fact that, in series with the varistor (3.4), between conductors (3.6) and (3.7) is connected gas discharger (3.9) with rated pulse current equal to that of varistor (3.4).

3. High voltage rechargeable battery module (1) according claim 1 characterized by the fact that, the varistor (3.4) and the gas discharger (3.9) are joined together in the common body of a complete article.

4. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, the electrostatic shield-normalizer (5) is a thin-walled metal cylinder coaxial with the battery (3) and cut lengthwise or, made by a metal foil, such as aluminium or copper, with a floating electrical potential.

5. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, the electronic switching and protective array (2) is made of two detached electrical components - commutation block (2.1) and protective impedance (2.5) in a common body (2.7) made of plastic or ceramic where, the battery (3) is connected to the terminal (2.4) commutation block (2.1) and terminal (2.6) of protective impedance (2.5).

6. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, inside the common housing (3.5) of the battery (3) closer to its end and between its terminals (3.2) and (3.3), thru its own conductors (3.6) and (3.7) is connected a powerful individual for the module (1) varistor (3.4) with rated voltage equal or higher than 1,5 amplitude of charging voltage so, for a battery of 800 V and charging voltage of 1000V the varistor is for example rated for 1500V.

7. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, in series with the varistor (3.4) and between the conductors (3.6) and (3.7), forseparation them galvanically from battery (3), is connected a gas discharger (3.9) with a rated pulse current equal to that of varistor (3.4) and a breaking voltage near to 1,2 times the amplitude of charging voltage.

8. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, longwise the whole battery (3), its varistor (3.4) and the electronic switch and protection array (2) there is made one or more canals (3.8) thru one of which, passed the conductor (3.7) of varistor (3.4) and gas discharger (3.9) which is connected to the other pole of the string of cells (3.1) thru conductor (3.6).

9. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, along the battery (3), from the first to the last of the string of cells (3.1), in the walls of the canal (3.8) there is integrated a valve in the form of a dielectric film rolled into a tube with overlapping of 3 to 4 mm longitudinal ends and, threated with hydrophobic substance or thin layer of electrolyte-tolerant elastomer.

10. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, inside the electronic and switching array (2) the commutation block (2.1) is made with separated discharging pole shoes (2.2) and charging pole shoes (2.3) for connection to a different busbars for charge and discharge.

11. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, inside the electronic and switching array (2) the commutation block (2.1) is made with combined pole shoes (2.2) and (2.3) for connection to a common busbar for charge and discharge.

12. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, the electrostatic shield-normalizer (5) is implemented but, varistor (3.4) isn’t.

13. High voltage rechargeable battery module (1) according to claim 1, characterised by the fact that, the varistor (3.4) and gas discharger (3.9) are implemented but, the electrostatic shield-normalizer (5) isn’t.

14. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, the electrostatic shield-normalizer (5) and varistor (3.4) are implemented but, the gas discharger (3.9) isn’t.

15. High voltage rechargeable battery module (1) according to claim 1, characterized by the fact that, the varistor (3.4) is made as a compressed zink oxide tablet with a longitudinal hole, part of canal (3.8) and two detached metalized strips, as if connected between them, are the surfaces upper and inner, along the canal (3.8)being a conductor (3.7) and, lower and outer, part of conductor (3.6), as non-metalized are the sections between them whereby conductor (3.7) is led along the canal (3.8) to its pole of battery (3).

16. Varistor (3.4) with a connected in series gas discharger (3.9) of high voltage rechargeable battery module (1) according claim 1 for galvanic separation purposes, according claims 1 and 3, characterized by the fact that, they are integrated in a completed article where, in a ceramic or plastic (for example, polypropylene) thick walled gastight cylinder (3.10) filled with gas and metallic vapour (for example nitrogen and quicksilver) are fixed by one bottom a free metallic electrode connected to a conductor (3.6) outside and, at a small distance from the second metalized bottom of varistor (for example 0,3mm) is fixed a compressed tablet of zink oxide - varistor (3.4) with two metalized bottoms one of which, connected to a conductor (3.7) out of cylinder (3.10) along which is made a canal coaxial with canal (3.8) and with the same diameter .

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